Upper Arm

Upper Arm









Removal

NOTICE: Suspension fasteners are critical parts because they affect performance of vital components and systems and their failure may result in major service expense. New fasteners with the same part number or an equivalent part must be installed if installation is necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to make sure of correct retention of these parts. Orientation of the fasteners is also important on all rear suspension arms. Make sure the fasteners are installed in the same direction as they were in when removed.

1. For reference during the installation procedure, measure the distance from the lip of the fender to the center of the wheel hub with the vehicle in a static level ground position.





2. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury Procedures.

Remove the wheel and tire. For additional information, refer to Wheels and Tires Removal and Replacement.

3. NOTICE: Do not use excessive force when removing the pivot bolt and flagnut on the right upper suspension arm-to-axle bracket. Damage to the brake line may occur.

Remove and discard the upper arm-to-axle bolt and flagnut.

4. Remove the upper arm-to-frame bolt and the upper arm.
- Discard the nut and bolt.

Installation

1. NOTE: The rear suspension upper arms are interchangeable from side-to-side, with FRONT and OUTBOARD stamped on the side of the arms for positioning during installation.

Position the upper arm and loosely install the new upper arm-to-frame bolt.

2. Loosely install the new upper arm-to-axle bolt and flagnut.





3. Before tightening the fasteners, use a suitable jack to raise the suspension until the distance between the lip of the fender and the center of the wheel hub is equal to the measurement taken in the removal procedure.

4. Tighten the upper arm-to-frame bolt to 150 Nm (111 lb-ft).

5. Tighten the upper arm-to-axle bolt to 90 Nm (66 lb-ft).

6. Install the wheel and tire. For additional information, refer to Wheels and Tires Removal and Replacement.

7. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury Description and Operation.

If equipped with a fire suppression system, repower the system.