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Suspension and axle engineering.

A lift kit is a shopping list. Suspension is a decision.

Coil-converted 40 Series suspension and axles by USJ 4x4 Garage

How a 4x4 rides, articulates and drives is decided by the suspension and axles, and by whether they were engineered together or bolted on one part at a time. We do the former.

Coil conversions

Converting a leaf-sprung 4x4 to coils buys articulation and ride quality that leaves cannot match off road. But only if the geometry, the mounts and the links are engineered, not bolted on from a generic kit. Done right, it transforms the vehicle. Done wrong, it drives worse than stock.

The gearing, the lockers and the tyre size are one decision, not three.

Axles, lockers and gearing

Fit bigger tyres and you change everything: gearing, load on the axles, driveline angles, braking. We rebuild axles and set gearing and lockers as one package, so the vehicle drives properly on the road and works when the road runs out.

Matched to how you actually use it

A daily-driven overlander and a hardcore off-road build need different suspension, even on the same vehicle. We set it up for how you will actually use it, not for how it looks parked or how it photographs on a hill.

Suspension & axle work in our builds

The 40The V12 Cruiser

Want it to actually drive right?

Tell us the vehicle, the tyres and how you use it. We will engineer the suspension and axles to suit, not guess.