Upper Control Arm & Bushings: Installation

Place control arm in position on bracket and install mounting nuts. On C10 and G10/20 models (with rubber bushings), before tightening nuts, insert caster and camber shims in the same order as removed. Tighten mounting nuts to specification.
NOTE: A normal shim pack will leave at least 2 bolt threads exposed beyond the nut. If 2 threads cannot be obtained, check for damaged control arms and related parts. The difference between front and rear shim packs must be no more than .30" (7.62 mm). The front shim pack must be at least .24" (6.09 mm) thick. Always tighten thinner shim pack's nut first for improved shaft-to-frame clamping force and torque retention.
On C20/30 and G30 models (with steel bushings), position pivot shaft-to-frame bolts and start pivot shaft nuts. Tighten shaft end nuts. Check for proper spacing. See Fig 1 . The shaft should rotate by hand after tightening nuts.

Fig 1: Positioning Upper Control Arm Pivot Shaft (W/Steel Bushings) Ensure shaft rotates by hand after end nuts are tightened.
Install caster and camber shims in the same order as removed and tighten pivot shaft-to-frame mounting nuts. Remove safety chain and install wheel and tire assembly. Lower vehicle.
On C10 and G10/20 models, insert ball joint stud into steering knuckle and install nut. Tighten stud nut to specification and install new cotter pin. To complete installation, reverse removal procedure. After installation, check front end alignment.