Fig. 1: Exploded view of the upper control arm components
Loosen the wheel lugs nuts slightly. Raise and support the front end on
jackstands placed under the frame.
Remove the wheels. Support the lower arm with a floor jack.
Remove the cotter pin and nut from the upper ball joint and separate the
ball joint from the upper arm using a ball joint separator tool.
Remove the nuts and bolts that retain the upper arm shaft to the support
bracket. Note the number and location of the shims under the nuts. These must
be installed in their exact locations for proper wheel alignment. Check all
parts for wear or damage. Replace any suspect parts.
Place the control arm assembly in position. Install the mounting bolts and
nuts with the alignment shims in correct positions. Torque the upper arm shaft
mounting bolts to: 2WD 60–68 ft. lbs. 4WD 69–85 ft. lbs. Tighten
the ball joint nut to 30–37 ft. lbs. and install a new cotter pin.
