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Home >> Pontiac >> 1968 >> GTO Automatic Trans >> Repair and Diagnosis >> Suspension >> Front Suspension >> Automatic Level Control >> Adjustment >> Trim Adjustment
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Trim Adjustment

  1. 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.

  2. 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.
  3. 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.
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