Upper Control Arm

NOTE: Before proceeding, review all SERVICE WARNINGS AND CAUTIONS found under Suspension, Service Precautions.

REMOVAL
1. Apply the parking brake.
2. Raise vehicle. See Maintenance for the required lifting procedure.
3. Remove rear wheel and tire assembly.
4. Remove the cotter pin, nut lock, and spring washer from the axle yoke.





5. Remove the hub nut and washer mounting the yoke to the hub and bearing.
6. Release the parking brake.
7. Remove the shock assembly from the vehicle. Refer to Shock Absorber, Service and Repair for the procedure.

NOTE: Axle shaft removal is required to allow the use of the special tool required to remove the upper control arm ball joint from the steering knuckle.

8. Remove the axle shaft from the vehicle.





9. Remove the yoke from the hub and bearing. The yoke should be removable by pulling it out the rear of the hub and bearing by hand. If yoke will not come out of the hub and bearing pulling on it by hand, use Puller, Special Tool CT-1003, to push the yoke out of the hub and bearing.





10. Remove the axle shaft yoke from the back side of the rear hub and bearing.





11. Remove the tie wrap attaching the park brake cable to the rear knuckle.





12. Remove the cotter pin and castle nut attaching the upper control arm ball joint to the knuckle.





13. Install Adapter, Special Tool 6962, on top of the lower ball joint.

CAUTION: Do not strike or apply heat to the knuckle when removing the ball joint stud from the knuckle. Apply force to the upper ball joint stud using only the special tools, until the stud separates from the knuckle.





14. Install Puller, Special Tool 6961, between Adapter, Special Tool 6962, and the stud of the upper ball joint. Hold hex portion of Puller, Special Tool 6961, while turning the bolt to apply pressure against the stud of the upper ball joint. Continue applying pressure until the upper ball joint stud separates from the steering knuckle.





15. Remove the 2 bolts and nuts attaching the rear upper control arm to the mounting brackets.
16. Remove the control arm from the vehicle.

INSTALLATION
1. Install the upper control arm back into the frame rail mounting brackets. Install the upper control arm pivot bolts as shown. Do not tighten the pivot bolts at this time.
2. Install the upper ball joint stud into the steering knuckle. Install the upper ball joint stud to steering knuckle attaching nut. Tighten the ball joint stud castle nut to a torque of 102 Nm (76 ft. lbs.). Install the castle nut retaining cotter pin.
3. Install the axle shaft yoke into the rear hub/ bearing.
4. Install the washer and hub nut mounting the yoke to the rear hub and bearing. Do not fully tighten the mounting nut at this time.

CAUTION: The bolts attaching the axle shaft universal joint clamps to the differential and yoke are not reusable. They must be replaced with new bolts. If new bolts cannot be obtained, the removed bolts can be cleaned and have new thread locker applied, then reused as a substitute for new bolts.

5. Install the axle shaft back in the vehicle.
6. Install the shock assembly. Refer to Shock Absorber, Service and Repair for the installation procedure. Remember not to tighten the shock upper or lower mounting bolts at this time. They must be tightened later with the vehicle standing at design height.
7. Apply the parking brake to keep axle from moving while performing the next step.
8. Tighten the hub nut to a torque of 257 Nm (190 ft. lbs.).
9. Install the spring washer, retainer, and cotter pin for the rear hub nut on the yoke.
10. Install the wheel and tire. Tighten the wheel mounting stud nuts in proper sequence until all nuts are torqued to half specification. Repeat the tightening sequence to the full specified torque of 122 Nm (90 ft. lbs.).
11. Lower the vehicle to the ground.
12. Position the vehicle on an alignment rack or drive-on hoist.
13. Ballast (weight) the vehicle to the correct design height. Refer to Design Height Measurement found in Wheels, Tires and Alignment, Alignment, Adjustments.
14. Once the vehicle is set to the correct design height, tighten both rear upper control arm mounting bolts to 95 Nm (70 ft. lbs.).
15. Tighten the shock upper mounting bolt to a torque of 135 Nm (100 ft. lbs.) and the bottom mounting bolt to a torque of 189 Nm (140 ft. lbs.).
16. Remove the ballast (weight) from the vehicle. Correctly jounce the vehicle letting it return to its curb height.
17. Measure the vehicle's curb height. Refer to Curb Height Measurement found in Wheels, Tires and Alignment, Alignment, Adjustments.
18. Align the vehicle per the service procedure listed in Wheel Alignment.