Ball Joint Inspection - Backlash

Ball Joint Inspection-Backlash

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 luggage compartment. 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. Inspect the ball joint boots for tears. If torn, install a new arm as necessary.
3. Prior to inspecting the ball joints for lateral backlash and end play, inspect the wheel bearings.
4. Using safety stands, support the front suspension lower arms.
5. While an assistant pushes and pulls equally on the top and bottom of the tire, observe any relative lateral backlash between the upper and lower arms and the wheel knuckle. If backlash is evident, a new upper or lower arm must be installed.
6. While an assistant pries upwards on the bottom of the tire, observe any relative end play between the upper and lower arms and the wheel knuckle. If end play is evident, a new upper or lower arm must be installed.
7. Remove the safety stands.
8. Lower the vehicle.