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Home >> Pontiac >> 1987 >> Firebird Formula, 5.0 F >> Repair and Diagnosis >> Suspension >> Wheel Alignment >> Wheel Alignment Specifications & Procedures >> Adjustments >> Caster Adjustment
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Caster Adjustment

NOTE: Jounce vehicle several times to settle suspension. Release on down stroke. Check for proper tire pressure, worn steering or suspension components.
  1. Before alignment, relay rod height must be checked and adjusted. If relay rod height is not correct, vehicle could exhibit "Orbital Steer" (different handling on right and left-hand turns).
  2. To check height, clean both flats on bottom of relay rod. Install Relay Rod Adjustment Gauge (J 33093) on flat near Pitman arm. Install socket onto head of front pivot bolt on left side lower control arm. See Figure .
  3. Measure dimension "A" between flange of gauge and bottom of socket. See Figure .
  4. Transfer socket and adjustment gauge into position on idler arm end of relay rod. See Figure . Adjust idler arm position until dimension "B" matches dimension "A" within .04" (1 mm).
  5. Caster is adjusted by moving position of upper strut mount assembly forward or backward. Adjust by loosening 3 nuts on top of mount. The weight of vehicle will normally cause strut assembly to move to full inboard position.
  6. Install Alignment Adjuster (J 29724) by bolting bracket end to fender with original fender bolt. Install turnbuckle hook on upper strut mount assembly. Tighten until proper camber reading is obtained. Tap mount forward or backward with rubber mallet to adjust caster. Tighten nuts to specification. See Figure .
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