Upper

Special Tool(s):

Removal

1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the RH kick panel. 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. Raise and support the vehicle.

2. CAUTION: Do not use heat to loosen a seized wheel nut. Heat can damage the wheel and the wheel bearings.

Remove the tire and wheel assembly.





3. Use the High-Lift Jack to support the front suspension lower arm.





4. Mark the position of the front suspension upper arm cam.





5. Remove the upper ball joint castle nut.
1. Remove and discard the cotter pin.
2. Remove the nut.





6. Use the Pitman Arm Puller to separate the ball joint from the front wheel spindle.





7. Remove the front suspension upper arm.
1. Remove the two nuts and the two bolts.
2. Remove the front suspension upper arm.

Installation

1. Note: Align the marks made during removal on the front suspension upper arm cams.

Note: The forward front suspension upper arm nut must be tightened first while the control arms are held at the curb position ride height.





Install the front suspension upper arm.
1. Position the front suspension upper arm.
2. Install the bolts and nuts.





2. Install the upper ball joint castle nut.
1. Install the nut.
2. Install a new cotter pin.

3. WARNING: When a wheel is installed, always remove any corrosion, dirt or foreign material present on the mounting surfaces of the wheel or the surface of the wheel hub, brake drum or brake disc that contacts the wheel. Installing wheels without proper metal-to-metal contact at the wheel mounting surfaces can cause the wheel nuts to loosen and the wheel to come off while the vehicle is in motion, causing loss of control.

Clean the wheel hub mounting surface.

4. Note: If equipped with air suspension, reactivate the system by turning on the air suspension switch

Install the tire and wheel assembly.
5. Inspect and adjust the front end alignment.