Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Trim Adjustment
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NOTE: Make adjustment with full fuel tank, or equivalent weight.
Raise vehicle and support axle. Remove shock absorber line at control valve. Connect a fill valve to air supply line. Inflate shock absorbers to 8-15 psi. Jounce vehicle to equalize suspension.
- Connect test gauge to shock absorber adapter on control valve and attach an air pressure source (80-110 psi) to gauge. Loosen height control valve lever adjusting nut. Hold overtravel lever in exhaust position until air escapes from exhaust port.
- Slowly move overtravel lever toward neutral position and point a minimum air bleed through exhaust port. Tighten nut. A slight continuous air bleed should be noticeable. Lower vehicle to floor and inflate system through service valve on compressor.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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