Before you replace the upper ball joint, take out the rear upper
Control Arm. To hold the control arm, place Position Receiving Cup, Special Tool 6758, under it and insert Remover/Installer, Special Tool 6804, onto the ball joint assembly. Pull the ball joint assembly out of the control arm by using an arbor press. If you discover physical damage to the control arm, it should be replaced, because it is impossible to fix. If the pivot bushings on the control arm can be seen to be worn, then you must change the entire control arm. The assembly of the rear control arm, bushings and pivot connector are replaced all at once, but the rear upper ball joint and its seal can be serviced individually. Hold the ball joint assembly up to the ball joint bore on the control arm, pointing it straight up and down, without cocking it during installation. Attach the Receiving Cup Tool 6758 to the arbor press and grip the lower control arm. Add the Supports, Special Tool 6806, to the ball joint assembly above and insert the Remover/Installer tool 6804. Hold back the ball joint enough to leave a clear space of 3 mm (1/8 inch) between its lip and the control arm. After that, refit the control arm to the suspension, lining up the pivot bar with the holes in the rear suspension crossmember and fastening the 2 bar attaching bolts to 108 Nm (80 ft. lbs.). Lift the rear suspension crossmember with a transmission jack and put the four attaching bolts in place, but do not tighten them. Use the correct drift size to line up the rear suspension crossmember, fasten all crossmember to frame attaching bolts to 108 Nm (80 ft. lbs.) and take out the drifts. Take out the transmission jack, attach the upper ball joint stud to the knuckle and tighten the ball joint nut to 27 Nm (20 ft. lbs.). Place the brake tubing into the routing clips on the top of the rear suspension crossmember and fasten the rear
Brake Calipers to the rear knuckles. Should the car be equipped with antilock brakes, place wheel speed sensor heads at the top of each rear knuckle and torque the sensor mounting bolts to 8 Nm. Fasten the routing clips to the brackets on each upper control arm for the wheel speed sensor cables and make sure the attaching bolts are secure. Fasten the muffler support bracket to the back of the frame rail and click the rear exhaust pipe hanger on the back of the suspension crossmember. Attach the rear knuckle clevis brackets, then tighten the bolts to 95 Nm (70 ft. lbs.). Mount the wheel and tire and, working from one side to another, tighten the wheel nuts by quarter increments until the final 135 Nm (100 ft. lbs.). Suspend the vehicle and correct or reset the rear wheel camber and toe, following the ideal specifications required.