A drivetrain system that delivers engine power to only two wheels, either the front or rear axle. While suitable for everyday road driving, a 2WD vehicle generally offers significantly less traction than a 4WD when driving on loose, uneven or slippery terrain.

A drivetrain system that delivers power to both the front and rear axles, providing improved traction in off-road conditions. Most modern 4WD vehicles feature either a part-time or full-time four-wheel drive system and are designed to tackle challenging terrain including mud, sand, rocks and steep inclines.

A four-wheel drive mode that provides power to both axles while maintaining normal road gearing. 4H is commonly used on gravel roads, wet conditions, sand and light off-road tracks where additional traction is required without sacrificing vehicle speed.

A low-range gearing mode that significantly increases torque while reducing vehicle speed. Low range is used for technical off-road driving, steep climbs and descents, deep mud, rock crawling, towing on difficult terrain and vehicle recovery situations.

A heavy-duty axle shaft configuration featuring thirty-five splines where the axle engages the differential side gear. Compared to factory spline counts, 35 spline axles provide substantially greater strength and are commonly used in heavily modified off-road vehicles running large tyres and differential lockers.

A remote reservoir shock absorber hose that allows the reservoir to be mounted in virtually any position around the shock body without restricting suspension movement or compromising hose routing.

Commonly referred to as a 2-inch lift, a 50mm suspension lift increases ride height to improve ground clearance, suspension travel and tyre clearance. It is one of the most popular lift heights for Australian touring and recreational four-wheel drives.

A heat-treated aluminium alloy widely used in premium suspension and steering components due to its excellent corrosion resistance, strength-to-weight ratio and machinability. Superior Engineering uses 6061-T6 aluminium in a range of precision CNC machined billet products.

A high-strength aerospace-grade aluminium alloy offering significantly greater tensile strength than 6061-T6. It is commonly used for premium billet suspension and steering components where maximum strength and minimum weight are required.

A high-performance monotube shock absorber featuring a 2.0-inch body and external remote reservoir. The additional oil capacity improves cooling, reduces shock fade and provides more consistent damping performance during prolonged off-road driving.

A premium large-body monotube shock absorber featuring a 2.5-inch body and external remote reservoir. The increased piston area, oil volume and cooling capacity provide exceptional damping control for heavily loaded touring vehicles, high-speed off-road driving and extreme four-wheel driving.

A premium shock absorber allowing independent adjustment of rebound damping, low-speed compression damping and high-speed compression damping. This enables suspension performance to be precisely tuned for varying vehicle weights, terrain and driving styles.

An electric air compressor powered by a vehicle's 12-volt electrical system. Commonly used for inflating tyres after off-road driving, operating air lockers and supplying compressed air for accessories or workshop equipment.

An electrically powered recovery winch driven by a vehicle's 12-volt battery system. Mounted to the front or rear of a four-wheel drive, it is used to recover vehicles from difficult terrain such as mud, sand, rocks or steep inclines.

A twenty-four-volt electrical system commonly found in heavy-duty trucks, military vehicles and some commercial four-wheel drives. Accessories including winches and air compressors must be compatible with the vehicle's operating voltage.

An electronic braking safety system that prevents the wheels from locking during heavy braking. ABS helps maintain steering control and is integrated with many modern traction and stability control systems.

The combined weight of aftermarket accessories fitted to a vehicle, including bull bars, winches, roof racks, long-range fuel tanks, canopies and drawer systems. Accessory weight should always be considered when selecting suspension components.

A steering geometry principle that allows the inside front wheel to turn at a greater angle than the outside wheel during cornering. Correct Ackermann geometry improves handling and reduces tyre scrub.

A coilover suspension assembly that allows ride height, spring preload or damping characteristics to be adjusted to suit different vehicle loads or driving conditions.

A heavy-duty panhard rod with threaded adjustment used to re-centre a live axle after a suspension lift. It restores correct axle alignment and improves steering feel.

Replacement radius arms designed to restore caster angle and pinion angle after a suspension lift while increasing strength and suspension articulation.

A shock absorber that allows the damping force to be adjusted. Depending on the design, adjustments may include rebound, low-speed compression, high-speed compression or a combination of all three.

Replacement suspension components manufactured to improve ride quality, handling, load carrying capability, suspension travel or off-road performance compared to factory equipment.

An air-assisted suspension system using inflatable rubber bellows to support vehicle weight. Air bags assist with load levelling but do not legally increase GVM unless installed as part of an approved GVM Upgrade.

A device that compresses air for inflating tyres, operating air lockers, air tools or air suspension systems. Portable and permanently mounted compressors are commonly used in four-wheel drives.

The process of reducing tyre pressure before driving off-road. Lower tyre pressures increase the tyre's contact patch, improving traction and ride comfort on sand, rocks and corrugated tracks.

A selectable differential locker operated using compressed air. When engaged, both axle shafts are mechanically locked together to maximise traction.

The adjustment of a vehicle's steering and suspension geometry to achieve the correct caster, camber and toe settings. Proper alignment improves handling, tyre wear and steering performance.

A versatile tyre designed to provide balanced performance on sealed roads and off-road terrain. All-terrain tyres are popular for touring due to their combination of durability, traction and road comfort.

A belt-driven electrical generator that charges the vehicle's battery and supplies power to electrical accessories while the engine is running.

Suspension geometry designed to reduce the amount of front-end dive experienced during braking by controlling weight transfer through the suspension.

Also known as a sway bar, this suspension component connects the left and right sides of the suspension to reduce body roll during cornering.

The maximum angle a vehicle can approach an obstacle before the front bumper or chassis contacts the ground. Increasing suspension lift or fitting high-clearance barwork can improve the approach angle.

The amount of independent wheel movement available as the suspension travels over uneven terrain. Increased articulation helps maintain tyre contact and improves off-road traction.

A suspension system designed to maximise wheel travel while maintaining stability and control over rough terrain.

A shaft or assembly that transfers engine torque to the wheels. Live axles also support vehicle weight and house the differential.

The structural housing that supports the differential centre, axle shafts and wheel bearings. Heavy-duty axle housings provide increased strength for demanding off-road use.

A hardened steel shaft that transfers drive from the differential to the wheels.

A condition where torque causes a live axle housing to rotate under acceleration, commonly affecting leaf sprung vehicles. Excessive axle wrap can cause wheel hop and driveline wear.

A reinforcement welded or bolted to an axle housing to increase rigidity and reduce the risk of bending during heavy off-road use.

A differential that automatically locks when traction is lost without requiring driver input, then unlocks during normal cornering.

An auxiliary oil cooler designed to reduce automatic transmission fluid temperatures when towing, carrying heavy loads or driving in demanding off-road conditions.

A spherical pivot that connects steering and suspension components while allowing movement in multiple directions. Worn ball joints can cause poor steering response, suspension noise and uneven tyre wear.

A hydraulic valve located within some shock absorbers that helps control oil flow and damping characteristics during suspension movement.

The reinforced inner edge of a tyre that seals securely against the wheel rim.

A specialised wheel that mechanically clamps the tyre bead to the rim, preventing the tyre from separating when operating at very low tyre pressures. Commonly used in extreme off-road applications.

A precision component that supports rotating parts while reducing friction. Bearings are found throughout a vehicle, including wheel hubs, differentials, gearboxes and driveline assemblies.

A flexible rubber sleeve used to protect steering racks, CV joints and suspension components from dirt, water and contaminants.

A solid block of aluminium that is CNC machined into a finished component. Billet components are known for their strength, precision and high-quality finish.

Precision CNC machined suspension control arms manufactured from billet aluminium to provide increased strength, reduced weight and improved suspension geometry.

Heavy-duty CNC machined radius arms designed to improve strength, suspension geometry and caster correction on lifted vehicles.

CNC machined sway bar extension blocks that relocate the sway bar to improve clearance for larger shock absorbers and suspension travel.

A lift achieved by fitting spacers between the body and chassis. A body lift increases tyre clearance without altering suspension geometry or axle ground clearance.

A rubber or polyurethane mounting that isolates the vehicle body from the chassis, reducing vibration and noise.

The leaning motion of a vehicle during cornering caused by weight transfer. Spring rates, sway bars and shock absorber tuning all influence body roll.

The arrangement and spacing of wheel stud holes on a wheel hub. Also referred to as the wheel's PCD.

The available space between engine components or suspension accessories and the underside of the bonnet.

The compressed air pressure produced by a turbocharger or supercharger above atmospheric pressure.

The distribution of braking force between the front and rear wheels. Correct brake bias improves braking stability and vehicle control.

A reduction in braking performance caused by excessive heat buildup within the braking system.

Hydraulic lines that carry brake fluid from the master cylinder to each brake caliper or wheel cylinder. Extended brake lines are commonly required on lifted vehicles.

The rotating disc that brake pads clamp against to slow or stop a vehicle.

A braking system modification designed to improve stopping performance through larger rotors, upgraded calipers, performance pads or braided brake lines.

A vent fitted to differentials, gearboxes and transfer cases that allows pressure equalisation while preventing oil leaks.

A kit used to relocate drivetrain breathers to a higher position, reducing the risk of water entering differentials, gearboxes or transfer cases during water crossings.

A protective bar fitted between the bull bar and side steps to protect the vehicle's guards and doors from trees, scrub and animal strikes.

A heavy-duty front protection bar designed to protect the front of a vehicle from animal strikes, improve recovery options and provide mounting points for accessories such as winches and driving lights.

A rubber, polyurethane or hydraulic component that limits suspension compression before metal-to-metal contact occurs, protecting suspension and shock absorber components.

Unwanted steering movement caused by changes in suspension geometry as the suspension moves through its travel.

A rubber or polyurethane component fitted between suspension parts to absorb vibration while allowing controlled movement.

A complete replacement kit containing bushes for suspension arms, sway bars, leaf springs or steering components.

A high-performance shock absorber that uses external bypass tubes to provide multiple damping zones throughout suspension travel, commonly used in motorsport and extreme off-road applications.

The inward or outward angle of a wheel when viewed from the front of the vehicle. Incorrect camber can reduce handling performance and accelerate tyre wear.

Suspension modifications or alignment adjustments designed to restore correct camber angles after lifting or lowering a vehicle.

An enclosed structure mounted over a ute tub to provide secure storage, weather protection and additional touring functionality.

A modification package designed to improve a vehicle's load carrying ability. Legal payload increases require an approved GVM Upgrade.

A safety barrier fitted behind the rear seats to prevent cargo entering the passenger compartment during sudden braking or collisions.

A support bearing used on two-piece tailshafts to maintain correct shaft alignment and reduce vibration.

The forward or rearward angle of the steering pivot when viewed from the side of the vehicle. Correct caster improves straight-line stability, steering feel and self-centring.

The process of restoring factory caster angle following a suspension lift using corrected radius arms, bushes or caster plates.

An oil separation device installed in the engine's crankcase ventilation system to reduce oil vapour entering the intake system.

The main structural frame of a vehicle that supports the body, engine, drivetrain and suspension components.

Structural strengthening added to a vehicle chassis to improve durability under increased loads or extreme off-road conditions.

A helical steel spring used to support vehicle weight, absorb impacts and maintain ride height.

A spacer installed above or below a coil spring to provide a small increase in ride height.

The chassis-mounted bracket that locates the upper end of a coil spring.

A suspension assembly combining a coil spring and shock absorber into a single unit. Many coilovers offer ride height and damping adjustment.

The resistance a shock absorber provides as it compresses. Compression damping influences ride comfort, body control and impact absorption.

The suspension movement that occurs as the wheel moves upward towards the chassis.

A driveline joint that transmits power through varying steering and suspension angles while maintaining constant rotational speed.

A suspension arm that locates the wheel and controls suspension movement while maintaining correct wheel alignment.

The amount of weight supported by each individual wheel. Proper corner weighting can improve handling and suspension balance.

Repeated ridges or bumps commonly found on unsealed roads. Suspension quality plays a major role in maintaining comfort and control over corrugated surfaces.

The overall gear reduction achieved in first gear low range. A higher crawl ratio provides greater torque and improved vehicle control during slow technical off-road driving.

A structural member connecting both sides of the chassis, providing strength and mounting points for drivetrain and suspension components.

A situation where opposite wheels lose contact with the ground, reducing available traction unless differential lockers or sufficient suspension articulation are present.

A steering or suspension correction component designed to restore factory geometry on lifted Toyota LandCruiser models.

A flexible rubber boot that seals and protects a CV joint from dirt, dust and moisture while retaining grease.

A modification that lowers the front differential to reduce CV joint operating angles after a suspension lift, helping improve reliability and reduce premature wear.

Computer Numerical Control machining is a highly precise manufacturing process used to produce suspension and steering components from billet materials with exceptional accuracy and repeatability.

An external adjustment mechanism on performance shock absorbers that allows compression damping to be increased or decreased to suit vehicle weight and terrain.

Another name for a shock absorber. Dampers control spring movement by converting suspension energy into heat, improving ride quality, handling and tyre contact.

The hydraulic resistance inside a shock absorber that controls how quickly the suspension compresses and rebounds.

A severe steering vibration that can occur in live axle vehicles, usually caused by worn steering or suspension components, incorrect wheel alignment, poor caster angle or unbalanced tyres.

The maximum angle a vehicle can descend from an obstacle before the rear bumper, tow bar or chassis contacts the ground.

Short for differential, the gear assembly that allows the left and right wheels on the same axle to rotate at different speeds while still transmitting engine power.

A vent fitted to the differential housing that allows pressure to equalise as the oil heats and cools.

A modification that lowers the front differential to reduce CV joint operating angles after a suspension lift.

A protective steel plate fitted beneath the differential housing to protect it from impacts with rocks and other obstacles.

A device that locks both axle shafts together so each wheel rotates at the same speed, maximising traction in off-road conditions.

The final drive gear ratio inside a differential. Lower numerical ratios favour highway driving, while higher numerical ratios improve torque multiplication and off-road performance.

A gear assembly located within an axle that transfers engine power to both wheels while allowing them to rotate at different speeds during cornering.

The internal carrier assembly containing the crown wheel, pinion and differential gears.

The outer housing that supports the differential centre, axle tubes and axle shafts.

A heavy-duty fabricated differential housing developed by Superior Engineering. Designed to significantly increase strength compared to factory housings, it is ideal for vehicles running larger tyres, increased power, differential lockers and demanding off-road conditions.

A specialised universal joint assembly that reduces driveline vibration by allowing greater operating angles than a conventional universal joint.

A mounting arrangement where a bolt is supported on both sides of a bracket, significantly increasing strength compared to single shear mounting.

The amount of suspension movement available as the wheel extends away from the chassis. Also known as droop.

A steering component connecting the steering box or pitman arm to the steering linkage on many live axle vehicles.

A steering modification that relocates the drag link to improve steering geometry on lifted vehicles.

The complete system that transfers engine power from the transmission to the wheels, including the transfer case, tailshafts, differentials and axle shafts.

The operating angle of tailshafts and universal joints. Excessive driveline angles can cause vibration and premature component wear.

A vibration caused by incorrect tailshaft angles, worn universal joints, damaged tailshafts or poor driveline geometry.

The amount of suspension extension available as the wheels move away from the chassis. Increased droop generally improves off-road articulation and traction.

A suspension bracket designed to relocate suspension mounting points after lifting a vehicle, restoring correct geometry.

A system that allows auxiliary accessories such as fridges, lighting and compressors to operate from a separate battery without discharging the starting battery.

A coil spring featuring two different spring rates that provide a comfortable ride under light loads while increasing support as suspension compression increases.

A protective rubber cover fitted over suspension or steering components to prevent dirt and moisture entering moving joints.

Superior Engineering's heavy-duty differential housing engineered to provide exceptional strength, increased ground clearance and improved durability for demanding off-road applications.

Superior Engineering's Electronically Controlled Damping Suspension shock absorber designed to provide electronically adjustable damping characteristics for improved ride quality and handling across varying terrain.

A differential locking system activated electronically rather than pneumatically or mechanically.

A vehicle safety system that uses wheel speed sensors and brake intervention to help maintain directional stability during cornering or emergency manoeuvres.

The slowing effect produced by the engine when the accelerator is released, particularly useful when descending steep hills in low range.

The inspection and approval process confirming that a modified vehicle complies with applicable engineering standards and road regulations.

Longer hydraulic brake hoses fitted to lifted vehicles to safely accommodate increased suspension travel.

Longer-than-standard leaf spring shackles used to provide minor suspension lift and additional articulation. Their legality varies depending on local regulations.

A shock absorber with increased stroke length, allowing greater suspension articulation and wheel travel.

A bracket fitted to raise the upper shock absorber mounting position, allowing the use of longer shock absorbers without modifying the chassis.

A remote oil reservoir connected to a shock absorber that increases oil capacity, improves cooling and reduces shock fade during prolonged off-road use.

Heavy-duty suspension components specifically designed for vehicles operating under high loads or severe off-road conditions.

A replaceable bush installed within the eye of a shock absorber or leaf spring to reduce vibration while allowing controlled movement.

A shock absorber featuring eyelet mounts at both the upper and lower mounting points.

The minimum distance between the exhaust system and nearby suspension, chassis or driveline components to prevent interference or heat damage.

A coolant reservoir that allows engine coolant to expand and contract as temperatures change while maintaining correct cooling system pressure.

An electronically operated system that disconnects the sway bar during off-road driving to increase suspension articulation before reconnecting it for on-road handling.

A differential housing manufactured from formed and welded steel plate rather than cast iron. Fabricated housings typically provide increased strength, improved ground clearance and greater resistance to bending under extreme off-road conditions.

The original suspension height specified by the vehicle manufacturer before any aftermarket modifications are fitted.

A design feature that allows a component or system to continue operating safely or minimise damage in the event of a failure.

High-speed suspension compression caused by sudden impacts such as rocks, potholes or washouts. High-speed compression damping controls how the shock absorber responds to these rapid suspension movements.

A commonly used off-road term describing a vehicle's suspension articulation and ability to keep all four tyres in contact with the ground.

A heavy-duty suspension joint designed to provide greater angular movement than conventional rubber or polyurethane bushes while maintaining strength and durability.

An axle design where the axle shaft transmits drive but does not support the vehicle's weight. Full floating axles are commonly found in heavy-duty four-wheel drives.

A brake rotor with a two-piece design that allows the braking surface to expand independently, reducing heat distortion and improving braking consistency.

The structural section forming the floor of the vehicle body.

A twin tube shock absorber using a nitrogen-charged foam cell to reduce oil aeration and minimise shock fade during prolonged off-road use.

A component manufactured by compressing heated metal under extremely high pressure. Forged parts generally offer greater strength than equivalent cast components.

A suspension system using four control arms to locate a live axle while allowing controlled suspension movement and articulation.

The overall length of a coil spring when it is not under load.

Manual or automatic hubs that disconnect the front axle from the wheels when four-wheel drive is not required, reducing drivetrain wear and improving fuel economy.

Shock absorber technology that automatically varies damping characteristics depending on suspension movement frequency to improve both ride comfort and handling.

The differential assembly located in the front axle that transfers drive to the front wheels in a four-wheel drive vehicle.

A suspension arm used on many live axle vehicles to control axle location while allowing vertical suspension movement.

A heavy-duty axle design where the vehicle's weight is supported by the axle housing and wheel bearings rather than the axle shafts, providing increased durability.

The maximum steering angle available before the steering reaches its mechanical stop.

A four-wheel drive system that continuously delivers power to both the front and rear axles without requiring manual engagement by the driver.

A premium shock absorber allowing independent adjustment of multiple damping circuits such as rebound, low-speed compression and high-speed compression.

An auxiliary electrical distribution panel providing fused power supplies for aftermarket accessories such as lighting, compressors and winches.

A shock absorber pressurised with nitrogen gas to reduce oil aeration, improve damping consistency and minimise shock fade.

The relationship between the input and output speeds of gears within the transmission, transfer case or differential. Different gear ratios affect acceleration, towing ability and engine RPM.

The process of multiplying engine torque by reducing output shaft speed through gearing. Low range provides significant gear reduction for technical off-road driving.

A popular range of all-terrain and mud-terrain tyres designed for four-wheel drive vehicles.

A general term referring to suspension modifications that restore factory steering and suspension geometry after a lift.

The maximum legal combined weight of the tow vehicle and trailer as specified by the vehicle manufacturer.

A leaf spring shackle fitted with grease nipples, allowing regular lubrication to reduce wear and extend service life.

A threaded fitting that allows grease to be injected into moving suspension or steering components using a grease gun.

The minimum distance between the ground and the lowest point of the vehicle excluding the tyres. Greater ground clearance improves obstacle clearance when driving off-road.

The amount of vehicle weight distributed over the tyre contact area. Lower tyre pressures increase the contact patch and reduce ground pressure, improving flotation on sand and soft surfaces.

The maximum legal operating weight of a vehicle including passengers, accessories, fuel, cargo and tow ball download. Exceeding the GVM is illegal and may affect vehicle safety and insurance.

An engineered suspension and compliance package that legally increases a vehicle's maximum Gross Vehicle Mass. A GVM Upgrade typically includes upgraded suspension components and must be certified in accordance with applicable regulations.

The process of verifying and correcting a vehicle's speedometer using GPS data following tyre size changes.

The maximum incline a vehicle can climb while maintaining forward motion.

An interior handle designed to assist occupants when entering, exiting or travelling over rough terrain.

A suspension pin featuring an internal grease passage that allows regular lubrication to reduce wear and increase service life.

A portable recovery device used to provide an anchor point for a winch where natural anchor points such as trees are unavailable.

The available space between the tyres and the vehicle's guards. Suspension lifts and wheel offset changes often increase guard clearance for larger tyres.

A coil spring designed with locating features to ensure correct seating throughout suspension travel.

A shock absorber shaft coated with hard chrome to provide excellent wear resistance, corrosion protection and long service life.

A style of four-wheel driving involving extended remote travel while carrying significant vehicle loads including camping equipment, fuel and water.

A rigid canopy fitted to the rear of a ute to provide secure, weather-resistant storage.

A crankshaft-mounted component that reduces engine vibration and protects internal engine components from torsional forces.

The process of transferring heat away from suspension, braking or drivetrain components. Improved heat dissipation increases performance and component longevity.

Suspension components specifically engineered to support increased accessory weight, towing loads or demanding off-road conditions while improving durability.

A gear-driven limited slip differential that automatically transfers torque to the wheel with greater traction without requiring clutch packs.

An additional spring designed to assist the primary suspension when carrying heavier loads or towing.

A design that improves the distance between suspension or chassis components and the ground, reducing the likelihood of obstacle contact.

A differential where the pinion gear is positioned higher within the housing. This improves front tailshaft angles and can increase gear strength depending on the application.

The shock absorber damping circuit that controls suspension movement during sudden impacts such as potholes, rocks and washouts.

An electronic driver assistance system that automatically controls braking to maintain a slow, controlled speed when descending steep terrain.

An electronic braking system that temporarily holds brake pressure when starting on an incline to prevent the vehicle rolling backwards.

The wheel mounting assembly containing bearings that allows the wheel to rotate on the axle.

A wheel designed so the centre bore locates precisely on the vehicle hub rather than relying solely on the wheel studs.

A high-performance suspension component that uses hydraulic damping to absorb heavy suspension impacts near full compression.

A condition where fluid cannot be compressed, preventing normal suspension or engine operation.

A steering stabiliser that uses hydraulic resistance to reduce steering kickback and improve steering control.

A Superior Engineering suspension arm designed to maximise suspension articulation while maintaining excellent strength and correct suspension geometry.

A front suspension design where each front wheel moves independently. IFS generally provides improved on-road comfort and handling while sacrificing some articulation compared to a live axle.

An Internal Floating Piston (IFP) shock absorber uses a floating piston to separate the shock oil from the nitrogen gas charge. This design reduces oil aeration, improves damping consistency and provides better heat management than conventional twin tube shock absorbers.

A component's ability to withstand sudden impacts without permanent deformation or failure.

A suspension system where each wheel moves independently of the opposite wheel, improving ride quality and handling.

The process of correctly positioning suspension or steering components during installation to maintain proper geometry.

The protective panel located inside the wheel arch that shields the engine bay and body from dirt, stones and water.

The floating piston inside an IFP or monotube shock absorber that separates the nitrogen gas chamber from the hydraulic oil.

The oil and gas chamber contained within the body of a shock absorber, as opposed to a remote reservoir design.

A rubber or polyurethane mount designed to reduce the transfer of vibration and noise between vehicle components.

A removable cover providing access to internal drivetrain or suspension components for maintenance and inspection.

The theoretical pivot point created by suspension link geometry that influences anti-squat, anti-dive and axle movement.

A shock absorber where the additional oil reservoir is incorporated into the shock body rather than mounted remotely.

A heat exchanger used on turbocharged engines to reduce the temperature of compressed intake air, improving engine efficiency and performance.

A shock absorber featuring multiple internal damping zones that progressively change damping characteristics throughout suspension travel.

A bush designed to absorb vibration while allowing controlled suspension or steering movement.

A system that automatically increases engine idle speed when additional electrical or mechanical loads are applied.

A higher vehicle stance achieved through suspension modifications to improve ground clearance, tyre clearance and off-road capability.

A shock absorber installed upside down compared to a conventional design, often improving protection of the shock shaft from dirt and stone damage.

A reinforced location on a vehicle designed to safely support the weight of the vehicle when using a jack.

A durable fuel or water container commonly carried on four-wheel drives for extended touring and remote travel.

The upward movement of the suspension as the wheel compresses towards the chassis. Also referred to as compression travel.

Another name for a bump stop. It cushions the suspension as it approaches full compression, preventing metal-to-metal contact.

The amount of angular movement a suspension or steering joint can achieve without binding or restricting suspension travel.

A bearing that supports a rotating shaft using a lubricated surface rather than rolling elements. Commonly found in turbochargers and some drivetrain components.

The process of using another battery or jump starter to start a vehicle with a discharged battery.

A recovery attachment style used in some recovery systems, designed to provide a secure connection point during vehicle recovery.

An accessory that increases the lifting height of a jack, particularly useful on lifted four-wheel drives.

A wide plate fitted beneath a jack to prevent it sinking into soft ground such as sand, mud or gravel.

A pivot point used on certain live axle steering systems that allows the steering knuckle to rotate.

A bearing supporting the king pin assembly to ensure smooth steering operation and reduce wear.

The inward angle of the king pin or steering axis when viewed from the front of the vehicle. KPI influences steering effort, stability and tyre wear.

A heavy-duty aftermarket coil or leaf spring designed to improve load carrying capacity and ride performance.

The steering knuckle connects the wheel hub to the suspension and steering system, allowing the wheels to pivot during steering.

A steering arm attached to the steering knuckle that transfers movement from the steering linkage to the wheel.

A seal that prevents dirt, water and contaminants entering the steering knuckle assembly.

A highly elastic recovery rope that stores kinetic energy to provide smooth and controlled vehicle recoveries while reducing shock loads on recovery points.

A tyre featuring Kevlar reinforcement to improve puncture resistance and sidewall strength for demanding off-road conditions.

The amount of weight, measured in kilograms, that a vehicle can legally carry including passengers, accessories and cargo.

A body-on-frame chassis design consisting of two longitudinal rails connected by crossmembers. It is commonly used in four-wheel drives due to its strength and durability.

The complete assembly of multiple leaf springs clamped together to form a single suspension spring.

A suspension spring consisting of multiple steel leaves stacked together. Leaf springs support vehicle weight while also locating the axle.

The rolled end of a leaf spring where bushes and mounting bolts are installed.

A pivoting bracket that allows a leaf spring to change length as it compresses and rebounds during suspension movement.

The increase in vehicle ride height achieved through suspension or body lift modifications.

A package of suspension components designed to increase ride height, improve ground clearance, accommodate larger tyres and enhance off-road capability.

A differential that automatically transfers torque to the wheel with greater traction while still allowing different wheel speeds during cornering.

A heavy-duty strap fitted to prevent the suspension from over-extending and damaging shocks, brake lines or driveline components.

A suspension design using multiple control arms or links to locate a live axle while allowing controlled articulation.

A solid axle where both wheels are connected by a single housing that contains the differential. Live axles are renowned for strength and suspension articulation.

The amount of weight a suspension system is designed to support while maintaining safe ride height and handling characteristics.

The maximum load that a tyre, wheel or suspension component is designed to safely support.

A towing system that distributes trailer weight more evenly across the tow vehicle and trailer axles to improve stability and handling.

A manual or automatic hub that connects or disconnects the front wheels from the front axle when engaging four-wheel drive.

A differential that mechanically locks both axle shafts together to maximise traction when one wheel loses grip.

A suspension system using longer control arms to improve suspension geometry, articulation and ride quality, particularly on highly lifted vehicles.

An aftermarket fuel tank with increased capacity, allowing greater driving range between refuelling stops.

A suspension system engineered to provide significantly greater wheel travel than the factory suspension, improving off-road performance and ride quality.

A differential where the pinion gear is positioned below the axle centreline. This is common in many factory rear differentials.

The low-speed, high-torque gear reduction available through a vehicle's transfer case. Low range provides improved control when climbing, descending or negotiating difficult terrain.

The shock absorber damping circuit responsible for controlling slower suspension movements such as body roll, braking dive, acceleration squat and cornering stability.

A threaded fastener used to secure a wheel to the vehicle hub. Also commonly referred to as a wheel nut.

The bolt pattern or Pitch Circle Diameter (PCD) that determines wheel compatibility with a vehicle hub.

A component precision CNC machined from a solid block of aluminium or steel to provide exceptional strength, accuracy and surface finish.

A front wheel hub that must be manually engaged or disengaged to connect the front wheels to the front axle in part-time four-wheel drive systems.

The greatest amount of suspension movement achievable while maintaining safe operation of the suspension, steering and driveline components.

The highest load a component such as a tyre, wheel, spring or suspension system is designed to safely support.

A differential locker that mechanically locks both axle shafts together without requiring compressed air or electronic activation.

A shock absorber using a single-cylinder design with a floating piston separating the oil and nitrogen gas. Monotube shocks provide superior heat dissipation, consistent damping and improved performance compared to many twin tube designs.

An aggressive off-road tyre featuring large tread blocks and deep voids to maximise traction in mud, loose dirt, rocks and other challenging terrain.

A suspension system using multiple control arms to precisely locate the axle or wheel while improving ride quality, handling and articulation.

A spring engineered with varying spring rates throughout its compression to provide both ride comfort and load carrying capability.

A fabricated or machined component used to securely mount suspension, steering or accessory components to the chassis or axle.

A flexible panel fitted behind the wheels to reduce the amount of mud, water and stones thrown from the tyres.

A protective panel surrounding the wheel arch that shields the vehicle body from debris thrown by the tyres.

The ability of a tyre or vehicle to maintain traction and forward momentum in muddy conditions.

The relationship between wheel movement and suspension component movement. Motion ratio influences spring and shock absorber performance.

The total amount of suspension movement available between full compression and full extension.

The eyelet located at the end of a shock absorber or suspension component used for mounting.

A vehicle that has been altered from factory specifications through aftermarket accessories or engineering modifications.

A monotube shock absorber connected to an external reservoir that increases oil capacity, improves cooling and reduces shock fade during demanding off-road driving.

The acceptable variation in the dimensions of a manufactured component while still meeting design specifications.

The recommended inspection and servicing intervals for suspension, steering and driveline components to ensure continued performance and reliability.

A wheel alignment setting where the top of the wheel leans inward towards the vehicle. Excessive negative camber can increase inner tyre wear.

A steering characteristic where the vehicle maintains predictable handling without excessive understeer or oversteer.

A shock absorber pressurised with nitrogen gas to reduce oil foaming and maintain consistent damping performance.

A nitrogen gas charged twin tube shock absorber designed to improve ride comfort, handling and durability over standard factory shock absorbers.

A collective term describing unwanted noise, vibration and harshness experienced by vehicle occupants. Suspension design and bush selection play a significant role in controlling NVH.

The intended ride height increase provided by a suspension lift kit under standard vehicle loading conditions.

A shock absorber with fixed damping characteristics that cannot be altered by the user.

The suspension height of a vehicle under standard operating conditions without additional load.

A lightweight front protection bar primarily designed to protect against minor impacts and provide mounting points for accessories.

A roller bearing using long, thin rollers to support rotating shafts while minimising friction and overall bearing size.

A suspension or steering bush manufactured from nylon for applications requiring increased durability and reduced compliance.

A locking nut incorporating a nylon insert that helps prevent loosening caused by vibration.

A one-way valve allowing fluid or air to flow in only one direction.

The natural resting position of a suspension or steering component when the vehicle is sitting at normal ride height.

The specified spring rate determined by the spring manufacturer under standard testing conditions.

Components manufactured to the same specifications as the original parts fitted to a vehicle when it left the factory.

A side slope where the vehicle leans sideways, increasing the risk of reduced traction or rollover if not driven correctly.

Driving away from sealed roads on surfaces such as dirt, sand, rocks, mud or gravel.

Suspension specifically engineered to improve wheel travel, ride quality, durability and traction in demanding off-road conditions.

The distance between the wheel mounting face and the centreline of the wheel. Wheel offset influences track width, steering geometry and tyre clearance.

The volume of hydraulic oil contained within a shock absorber. Increased oil capacity improves cooling and reduces shock fade.

The formation of air bubbles within shock absorber oil, reducing damping performance. Nitrogen charging and floating pistons help minimise oil aeration.

A standard differential that allows the left and right wheels to rotate at different speeds. If one wheel loses traction, most of the engine torque is directed to that wheel.

The angle at which a universal joint, CV joint or tailshaft operates. Excessive operating angles can lead to vibration and premature wear.

A Superior Engineering pre-engineered touring package combining suspension and supporting components for enhanced off-road capability and load carrying performance.

A Superior Engineering premium touring package designed for serious off-road travel, combining advanced suspension, engineered components and GVM Upgrade options where applicable.

A Superior Engineering suspension package designed for touring vehicles seeking improved comfort, handling and off-road performance.

A Superior Engineering heavy-duty touring package developed for vehicles carrying significant loads while maintaining excellent ride quality and off-road capability.

A condition where suspension components extend beyond their intended operating limits, potentially damaging shocks, brake lines or driveline components.

Long-distance self-reliant vehicle travel that combines off-road driving with camping and remote-area exploration.

A handling characteristic where the rear tyres lose grip before the front tyres, causing the rear of the vehicle to rotate more than intended during cornering.

An auxiliary spring designed to provide additional support only when heavier loads are applied.

The natural chemical reaction that can lead to corrosion on unprotected metal surfaces when exposed to oxygen and moisture.

A spacer plate used to adjust the mounting position of suspension or steering components to achieve correct geometry or clearance.

A shock absorber finished with a durable protective paint coating to improve corrosion resistance and appearance.

Also known as a track bar, a panhard rod locates a live axle laterally beneath the chassis. After a suspension lift, an adjustable panhard rod is commonly used to re-centre the axle and restore correct suspension geometry.

A chassis or axle-mounted bracket used to secure the panhard rod. Raised or lowered brackets are often used to correct roll centre and steering geometry on lifted vehicles.

The maximum amount of weight a vehicle can legally carry, including passengers, cargo, accessories and tow ball download. Payload is determined by subtracting the vehicle's kerb weight from its Gross Vehicle Mass (GVM).

The small drive gear that meshes with the crown wheel inside a differential to transfer engine torque to the axle shafts.

The operating angle of the differential pinion relative to the tailshaft. Correct pinion angle is critical for smooth driveline operation and minimising universal joint wear.

A bearing supporting the differential pinion gear, allowing smooth rotation while maintaining correct gear alignment.

The diameter of the imaginary circle passing through the centre of each wheel stud. PCD determines wheel compatibility with a vehicle hub.

A steering arm attached to the steering box that converts rotational steering input into side-to-side movement of the steering linkage.

A suspension bush manufactured from polyurethane, offering increased durability and steering precision compared to conventional rubber bushes.

A specialised axle design using geared hub reductions to significantly increase ground clearance beneath the differential while also providing additional torque multiplication.

A wheel alignment setting where the top of the wheel leans outward from the vehicle. Excessive positive camber can reduce handling and increase outer tyre wear.

A hydraulic or electric-assisted steering system that reduces steering effort while improving vehicle control.

The initial compression applied to a spring or bearing before normal operating loads are introduced. Spring preload can influence ride height and suspension response.

A coil spring with a variable spring rate that becomes firmer as it compresses, providing improved ride comfort while maintaining load support.

A shock absorber characteristic where damping force increases progressively throughout the suspension stroke to improve both comfort and control.

Another name for a tailshaft or driveshaft that transfers power from the transmission or transfer case to the differential.

A surface treatment such as zinc plating, powder coating, anodising or paint applied to protect components from corrosion and wear.

A load-assist shock absorber capable of increasing internal pressure to temporarily assist with ride height under additional load. These are less common on modern touring four-wheel drives.

A suspension design that transfers wheel movement through push rods to inboard-mounted springs and dampers. It is rarely used in production four-wheel drives but is common in motorsport.

Queensland's engineering guidelines governing vehicle modifications to ensure they meet safety and compliance requirements.

A sway bar system that can be quickly disconnected to increase suspension articulation during off-road driving and reconnected for improved on-road handling.

A removable locking pin designed for rapid installation and removal of accessories or suspension components without specialised tools.

A steering system requiring fewer steering wheel rotations from lock to lock, providing faster steering response.

A heat-treated steel that offers significantly improved strength, toughness and wear resistance, making it suitable for heavy-duty suspension and steering components.

A suspension spring design using a quarter-length leaf spring. It is rarely used on modern four-wheel drives but appears in some historic vehicle designs.

The body panel located between the rear door and the rear of the vehicle, often modified to improve tyre clearance on highly articulated off-road vehicles.

A recovery hitch designed for rapid installation into a standard tow hitch receiver, providing a rated recovery point for vehicle recoveries.

A steering system where a pinion gear moves a steering rack side to side to turn the front wheels. It is commonly used on independent front suspension vehicles.

A suspension arm used to locate a live axle while controlling fore and aft axle movement. Heavy-duty radius arms improve strength, articulation and caster correction.

A rubber or polyurethane bush fitted within a radius arm to absorb vibration while allowing controlled suspension movement.

A bracket that lowers the rear mounting point of a radius arm to restore suspension geometry on highly lifted vehicles.

The extension phase of suspension movement as the spring returns after compression.

The hydraulic resistance provided by a shock absorber as it extends. Correct rebound damping prevents excessive bouncing and maintains tyre contact with the ground.

An external adjustment mechanism that allows the rebound damping characteristics of a performance shock absorber to be altered.

A traction aid placed beneath the tyres to assist vehicles that are bogged in sand, mud or snow.

A vehicle-mounted attachment point specifically engineered and rated for vehicle recovery operations.

A heavy-duty strap designed for towing or static recoveries. Recovery straps should not be confused with kinetic recovery ropes, which stretch under load.

A shock absorber featuring an externally mounted oil reservoir connected by a high-pressure hose. The increased oil capacity improves cooling, reduces shock fade and allows greater damping performance.

A measurement describing how quickly a vehicle's suspension naturally oscillates. Ride frequency influences comfort and handling characteristics.

The distance between the chassis or body and the ground. Suspension modifications are commonly used to increase ride height for improved off-road performance.

The theoretical point around which the vehicle body rolls during cornering. Suspension geometry changes following a lift can alter the roll centre and affect handling.

Suspension modifications designed to restore the roll centre after a suspension lift, improving steering response and cornering stability.

The maximum side slope a vehicle can safely negotiate before becoming unstable.

A change in steering angle caused by suspension movement during body roll. Correct suspension geometry minimises unwanted roll steer.

A flexible suspension bush designed to absorb vibration and reduce noise while allowing controlled movement between suspension components.

A collective term describing the suspension, steering, brakes, wheels, tyres and drivetrain components beneath the vehicle.

Long-distance driving through isolated areas where vehicle reliability, suspension performance and load carrying capability are critical.

A four-wheel drive vehicle purpose-built for negotiating large rocks and extreme technical terrain using maximum articulation, low gearing and differential lockers.

A heavy-duty side protection bar mounted to the chassis to protect the vehicle's sills while also acting as a pivot point when driving over rocks or obstacles.

Protective bars or guards fitted to shield the lower body panels from off-road damage.

A spherical bearing commonly used in performance suspension systems to allow high levels of articulation while maintaining precise suspension control.

A bearing using cylindrical rollers to reduce friction while supporting heavy radial loads.

The maximum amount of weight that can safely be carried on a vehicle's roof, including roof racks and accessories.

An off-road track featuring deep wheel ruts that challenge suspension articulation, ground clearance and traction.

A premium zinc coating process used to provide exceptional corrosion resistance for steel suspension and steering components. SA5 coating significantly extends component life in harsh Australian conditions.

The distance between the steering axis and the centre of the tyre contact patch. Wheel offset and suspension modifications can alter scrub radius, affecting steering feel and stability.

A federally approved manufacturing process that allows new vehicles to be modified before first registration. SSM enables approved manufacturers to offer engineered vehicle packages, including certified GVM Upgrades and complete vehicle conversions.

The tendency of the steering wheel to naturally return to the straight-ahead position after completing a turn. Correct caster angle is essential for good self-centring.

A differential locker that can be manually engaged or disengaged by the driver using air, electric or hydraulic actuation.

A shock absorber designed to be rebuilt and re-valved rather than replaced when worn.

A pivoting bracket connecting a leaf spring to the chassis, allowing the spring to change length during suspension movement.

The operating angle of a leaf spring shackle. Correct shackle angle improves suspension movement, ride quality and articulation.

A hydraulic damper that controls spring movement by converting suspension energy into heat. Shock absorbers improve ride comfort, handling, tyre contact and overall vehicle stability.

The main cylinder of a shock absorber containing the hydraulic oil, piston assembly and internal valving.

The mounting eyelet located at either end of a shock absorber.

A reduction in damping performance caused by excessive heat buildup and oil aeration inside the shock absorber.

The chassis or axle mounting point used to secure a shock absorber.

The precision-machined shaft that connects the piston to the external mounting point of a shock absorber.

The total amount of travel available within a shock absorber between full compression and full extension.

The chassis-mounted bracket supporting the upper shock absorber mounting point.

A bracket used to raise the upper shock mounting position, allowing longer shock absorbers to be fitted for increased suspension travel.

The internal hydraulic valve configuration within a shock absorber that determines its compression and rebound damping characteristics.

Driving across the side of a hill rather than directly up or down it. Side slopes require careful driving to maintain stability and traction.

A mounting arrangement where a bolt is supported on only one side of a bracket. Double shear mounts are generally stronger for heavy-duty applications.

A precision bearing allowing angular movement while maintaining accurate suspension geometry under load.

The mounting platform supporting the end of a coil or leaf spring.

The initial compression applied to a spring during installation or adjustment. Preload influences ride height but does not change the spring rate.

The amount of force required to compress a spring over a given distance. Correct spring rate selection is critical for ride quality, load carrying and suspension performance.

The upper or lower mounting surface supporting a suspension spring.

A toothed wheel used with a chain drive. While uncommon in suspension systems, sprockets are used in some winches and auxiliary drive systems.

The rearward suspension compression that occurs during acceleration due to weight transfer.

Another name for a sway bar or anti-roll bar that reduces body roll during cornering.

A gearbox that converts steering wheel rotation into movement of the steering linkage on many live axle vehicles.

A hydraulic damper fitted to the steering system to reduce kickback, vibration and steering shimmy, particularly on rough terrain.

The relationship between steering and suspension angles, including caster, camber, toe and Ackermann geometry. Correct steering geometry provides predictable handling and tyre wear.

The component connecting the wheel hub, suspension and steering linkage, allowing the front wheels to pivot during steering.

An adjustable or fixed stop that limits the maximum steering angle to prevent tyre or component interference.

A steering linkage connecting the steering system to the steering knuckles, transmitting steering input to the wheels.

A protective shield designed to prevent stones from damaging suspension, steering or braking components.

A suspension assembly combining structural support with damping. Unlike a conventional shock absorber, a strut forms part of the suspension's load-bearing structure.

A spacer fitted above a suspension strut to increase ride height without replacing the spring or strut assembly.

A protective plate fitted beneath the engine to protect the sump and other underbody components from impact damage.

A Superior Engineering heavy-duty suspension arm designed to maximise articulation, improve strength and restore suspension geometry on lifted vehicles.

The complete system of springs, shock absorbers, arms, bushes and linkages that supports the vehicle, absorbs road impacts and maintains tyre contact with the ground.

The arrangement and operating angles of suspension components. Maintaining correct geometry is essential for handling, ride quality, tyre wear and component longevity.

A modification that raises vehicle ride height by replacing or modifying springs, shock absorbers and associated suspension components.

The total distance the suspension can move between full compression and full extension.

Also known as an anti-roll bar or stabiliser bar, this component connects the left and right suspension to reduce body roll during cornering.

A mechanism allowing the sway bar to be disconnected during off-road driving to increase suspension articulation.

A bracket or spacer used to reposition the sway bar after a suspension lift, maintaining correct operating angles and improving clearance for larger shock absorbers.

A lightweight, high-strength recovery rope used on modern winches. Synthetic rope is safer to handle than steel cable and stores less kinetic energy if it fails.

Also known as a driveshaft or prop shaft, the tailshaft transfers engine torque from the transmission or transfer case to the differential.

The operating angle of the tailshaft relative to the transmission and differential. Correct tailshaft angles minimise vibration and extend universal joint life.

A conventional shock absorber that compresses and extends as the suspension moves through its travel.

The maximum amount of pulling force a material can withstand before failing. High tensile strength is critical for suspension and steering components subjected to heavy loads.

A vehicle system allowing the driver to select different driving modes that automatically adjust traction control, throttle response and transmission behaviour for varying terrain.

The reduction in braking or shock absorber performance caused by excessive heat buildup during prolonged use.

A coilover shock absorber featuring a threaded body that allows ride height and spring preload adjustment.

A steering component connecting the steering linkage to the steering knuckle. Tie rods transfer steering input while maintaining correct wheel alignment.

The ball joint fitted to the end of a tie rod, allowing steering movement while accommodating suspension travel.

The inward or outward angle of the wheels when viewed from above. Correct toe settings are essential for straight-line stability and even tyre wear.

A wheel alignment setting where the front of the tyres point slightly towards each other.

A wheel alignment setting where the front of the tyres point slightly away from each other.

The upper mounting point used to secure a shock absorber, strut or coilover to the chassis.

A rotational force produced by the engine and transmitted through the drivetrain to the wheels. Higher torque improves towing performance and low-speed off-road capability.

A precision tool used to tighten fasteners to a specified torque, ensuring suspension and steering components are installed correctly.

A suspension spring that stores energy by twisting rather than compressing like a coil spring. Torsion bars are commonly used in the front suspension of some four-wheel drives.

The downward force applied to a tow vehicle by a trailer coupling. Tow ball download forms part of a vehicle's GVM.

A square receiver mounted to the rear of a vehicle that accepts tow bars, recovery hitches and other towing accessories.

Another name for a panhard rod. It controls the lateral movement of a live axle beneath the chassis.

Suspension modifications designed to restore axle alignment and steering geometry after lifting a vehicle.

The distance between the centreline of the left and right wheels on the same axle. Wheel offset changes can increase or decrease track width.

The grip available between the tyres and the driving surface. Suspension performance, tyre choice and differential type all influence traction.

A recovery device placed beneath the tyres to assist vehicles that have become bogged in sand, mud or snow.

An electronic safety system that reduces wheel spin by applying the brakes or reducing engine power when traction is lost.

A gearbox mounted behind the transmission that distributes engine power to the front and rear axles while providing high and low range gearing.

A modification that lowers the transfer case slightly to reduce tailshaft operating angles and minimise driveline vibration after a suspension lift.

The total distance a suspension component moves between full compression and full extension.

The maximum designed operating range of a suspension component before reaching its mechanical stop.

The arrangement of grooves and tread blocks on a tyre that determines traction, water evacuation, road noise and off-road performance.

The gradual loss of tyre tread through normal use. Incorrect alignment or suspension geometry can accelerate tread wear.

A competition-focused off-road tyre designed for maximum traction on rocks, mud and technical terrain.

A shock absorber featuring an inner working cylinder and an outer oil reservoir. Twin tube shocks offer excellent ride comfort, durability and are commonly used in touring four-wheel drives.

The section of tyre in direct contact with the ground. Tyre pressure significantly influences the size of the contact patch and available traction.

A tool used to quickly and accurately reduce tyre pressures before driving off-road.

The air pressure contained within a tyre. Correct tyre pressure improves ride quality, traction, tyre life and fuel efficiency.

The dimensions of a tyre as specified by its sidewall markings, including width, aspect ratio and wheel diameter.

The reinforced side section of a tyre located between the tread and the bead. Stronger sidewalls improve puncture resistance during off-road driving.

The visible pattern of tyre wear that can indicate issues such as incorrect wheel alignment, worn suspension components or improper tyre pressures.

A heavy-duty U-shaped fastener used to clamp leaf springs securely to an axle housing.

Protective plates or guards fitted beneath a vehicle to shield the engine, transmission, transfer case and fuel tank from off-road damage.

A handling characteristic where the front tyres lose traction before the rear tyres, causing the vehicle to turn less than intended.

A leaf spring mounted beneath the axle housing rather than above it.

A flexible driveline joint that allows the tailshaft to transmit torque while operating through varying angles as the suspension moves.

The operating angle of a universal joint. Excessive angles can create vibration and reduce joint life.

The weight of suspension components not supported by the springs, including axles, wheels, tyres and brakes. Lower unsprung mass generally improves suspension performance.

The upper suspension arm used in many independent front suspension vehicles. Aftermarket UCAs are commonly fitted to restore wheel alignment following a suspension lift.

The upper chassis mounting point for a shock absorber.

A light commercial vehicle with an open cargo tray, commonly used as the platform for touring and off-road builds throughout Australia.

A protective surface treatment designed to minimise degradation caused by prolonged exposure to ultraviolet sunlight.

A complete package of components engineered to improve a vehicle's suspension, steering, load carrying capability or off-road performance.

The internal hydraulic valve system within a shock absorber that controls oil flow and determines compression and rebound damping characteristics.

A spring designed with changing spring rates throughout its compression to balance ride comfort and load carrying capability.

The study of how a vehicle responds to steering, braking, acceleration and suspension movement.

The process of safely removing a vehicle that has become stuck or immobilised using appropriate recovery equipment and techniques.

A hose connected to a differential, gearbox or transfer case breather that allows pressure equalisation while helping prevent water ingress.

A component designed to reduce unwanted vibration within the suspension, steering or drivetrain.

The National Code of Practice for Light Vehicle Construction and Modification used throughout Australia to guide engineering approval of vehicle modifications.

The Australian National Code of Practice covering heavy vehicle modifications and engineering requirements.

A vehicle's ability to remain controlled during steering, braking and cornering manoeuvres. Suspension geometry, tyres and shock absorbers all influence stability.

A limited slip differential using silicone fluid to transfer torque between the wheels when traction differences occur.

A measurement of an engine's ability to draw air into the cylinders relative to its displacement.

The reduction in electrical voltage caused by resistance within wiring or electrical connections, often affecting high-current accessories such as winches and compressors.

A suspension linkage used in some specialised suspension systems to influence axle movement and suspension geometry.

A section of track where water has eroded the surface, creating deep holes or channels that require increased suspension travel and careful wheel placement.

A suspension linkage that controls the lateral movement of a live axle while allowing near-vertical axle travel. It provides more consistent axle centring than a conventional panhard rod.

The process of adjusting caster, camber and toe to ensure the wheels are correctly aligned. Proper wheel alignment improves handling, tyre life and steering performance.

The body opening surrounding the tyre. Increased wheel arch clearance allows larger tyres and greater suspension travel.

The process of evenly distributing the weight of a wheel and tyre assembly to eliminate vibration at speed.

A precision bearing allowing the wheel hub to rotate smoothly while supporting the vehicle's weight.

Rapid bouncing of the driven wheels during acceleration caused by loss of traction or suspension geometry issues. Wheel hop is common on leaf sprung vehicles experiencing axle wrap.

A threaded fastener used to secure a wheel to the hub. Correct tightening torque is essential for safe operation.

The distance between the wheel mounting face and the centreline of the wheel. Offset affects track width, suspension clearance and steering geometry.

A spacer fitted between the wheel and hub to increase track width. Wheel spacers may not be legal in all Australian states and territories.

An electronic sensor used by ABS, traction control and stability control systems to monitor individual wheel speeds.

The distance between the centreline of the left and right wheels on the same axle.

The total vertical movement of a wheel from full compression to full extension of the suspension.

The distance between the centre of the front axle and the centre of the rear axle. Wheelbase influences ride quality, stability and off-road capability.

A powered recovery device used to pull a vehicle out of difficult terrain such as mud, sand or rocks using either synthetic rope or steel cable.

A steel cable used on traditional recovery winches. Steel cable is highly durable but heavier than synthetic rope and stores more energy under load.

A weighted blanket placed over a winch rope or cable during recovery to reduce recoil should the line fail.

A heavy-duty mounting system designed to securely attach a recovery winch to the vehicle chassis or bull bar.

The recovery line fitted to a winch. Modern winches commonly use lightweight synthetic rope in place of steel cable.

The maximum load that lifting or recovery equipment is designed to safely handle during normal operation.

A threaded stud permanently mounted in the wheel hub that secures the wheel using wheel nuts.

An unwanted vibration or oscillation in the steering or suspension system, often caused by worn components, incorrect alignment or unbalanced wheels.

A structural brace designed to increase chassis or suspension rigidity by connecting mounting points in a cross pattern.

A specialised suspension layout using crossed suspension links to improve axle control and articulation in specific applications.

A term commonly used to describe suspension systems engineered for extreme off-road use, heavy loads and maximum durability.

An informal term referring to exceptional suspension articulation or wheel travel.

Another name for a crossmember that provides structural support between chassis rails.

The rotational movement of a vehicle around its vertical axis. Modern stability control systems monitor yaw to assist with vehicle control.

An electronic sensor used by stability control systems to detect rotational movement of the vehicle.

A driveline component connecting a universal joint to a differential, transfer case or transmission output shaft.

A driveline modification that converts a slip yoke transfer case to a fixed yoke design, improving tailshaft strength and reliability on lifted vehicles.

The amount of stress a material can withstand before permanent deformation occurs. High yield strength is an important characteristic of quality suspension and steering components.

A corrosion-resistant surface treatment commonly applied to steel fasteners and suspension components.

An exhaust pipe that merges two exhaust pipes into one. While primarily an exhaust component, it may influence suspension and drivetrain clearance on modified vehicles.

A wheel offset where the mounting face sits exactly on the wheel's centreline. Zero offset changes track width compared to many factory wheels.

Also known as a grease nipple, a threaded fitting allowing grease to be injected into suspension or steering components for lubrication.

A protective coating applied to steel components to improve corrosion resistance and increase service life.

A corrosion protection process where a layer of zinc is electroplated onto steel components before optional passivation or sealing.

A premium corrosion-resistant coating providing superior durability compared to conventional zinc plating, commonly used on high-quality suspension and steering components.

A condition where there is virtually no free play between meshing gears or steering components, improving precision and responsiveness.

A suspension condition where there is no available extension travel remaining. This can severely limit off-road performance and suspension articulation.

A specialised linkage used in some older clutch or suspension systems to transfer movement between components.

A shock absorber tuning method where different sections of the suspension stroke are tuned independently to optimise comfort, handling and bottom-out resistance.

A chemical treatment applied after zinc plating to improve corrosion resistance and extend the service life of coated components.