Upper Arm

Upper Arm





Removal and Installation

CAUTION: Suspension fasteners are critical parts because they effect performance of vital components and systems and their failure can result in major service expense. A new part with the same part number or an equivalent part must be installed, if installation is necessary. Do not use a 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.

1. WARNING: The electrical power to the air suspension system must be turned off prior to hoisting, jacking or towing an air suspension vehicle. Failure to do so can result in unexpected inflation or deflation of the air springs, which can result in shifting of the vehicle during these operations. Failure to follow these instructions may result in personal injury.

If equipped, turn the air suspension service switch to the OFF position.

2. WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to Fire Suppression System.

With the vehicle in NEUTRAL, position it on a hoist.
3. Remove the shock absorber and spring assembly.
4. Detach the wheel speed sensor retainers from the upper arm.
5. Remove the 2 nuts, 2 bolts and the upper arm.
^ Discard the nuts and bolts.
^ To install, tighten to 150 Nm (111 lb-ft).

6. NOTESnug the upper arm-to-crossmember nuts and bolts and the shock absorber lower nut and flag bolt. Do not tighten until the installation procedure is complete and the weight of the vehicle is resting on the wheel and tire assemblies.

To install, reverse the removal procedure.
7. Check and, if necessary, align the front end.

8. WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System.

If equipped with fire suppression system, repower the system.