Lower Arm

Lower 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. NOTE: Use the holding feature to prevent the stud from turning while removing the nut.

Remove and discard the lower ball joint nut.
^ To install, tighten to 150 Nm (111 lb-ft).
4. Remove the shock absorber lower nut and the flag bolt.
^ Discard the nut and bolt.
^ To install, tighten to 235 Nm (173 lb-ft).

5. CAUTION: Do not remove the cam bolt at this time or damage to the steering bellows boot will result.

Remove the lower control arm cam bolt nut.
^ Discard the nut.
^ To install, tighten to 238 Nm (176 lb-ft).
6. Remove and discard the 3 lower arm bushing bracket bolts.
^ To install, tighten to 90 Nm (66 lb-ft).
7. Remove and discard the 2 steering gear nuts.
^ To install, tighten to 103 Nm (76 lb-ft).
8. Remove the power steering rack studs and move the steering gear upward to access the cam bolt.
^ To install, tighten to 30 Nm (22 lb-ft).
9. Remove the cam bolt and the lower arm.

10. NOTE: Snug the lower arm cam nuts and bolts, rear bushing nut 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.
11. If a new lower control arm is being installed, tighten the bushing retaining nut to 175 Nm (128 lb-ft).





12. Check and, if necessary, align the front end.

13. 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.