Operation CHARM: Car repair manuals for everyone.

Ball Stud and Knuckle Inspection - Front Suspension

Replace the ball joints if any looseness is detected in the joint, or the ball joint seal is cut. Complete the following steps in order to inspect the ball joints:
1. Raise the front of the vehicle. Refer to Vehicle Lifting.
2. Allow the suspension to hang free.
3. Grasp the tire at the top and bottom. Move the top of the tire in an in-and-out motion.
4. Inspect for any horizontal movement of the knuckle relative to the control arm.
5. Replace the ball joint if the following conditions exist:
- The ball stud is disconnected from the knuckle and looseness is detected.
- The ball stud twists in its socket while using finger pressure.

Inspect for ball stud tightness in the knuckle boss. Shake the wheel and feel for movement of the stud end or nut at the knuckle boss. Replace any worn or damaged ball joints and knuckles.