Ball Joint

Ball joints must be replaced if any looseness is detected in the joint, or the ball joint seal is cut.

To inspect the ball joints, raise the front of the vehicle, allowing the suspension to hang free. Grasp the tire at the top and bottom, and move the top of the tire in an in-and-out motion. Check for any horizontal movement of the knuckle relative to the control arm. If the ball stud is disconnected from the knuckle and looseness can be detected, or if the ball stud can be twisted in its socket using finger pressure, replace the ball joint.

Ball stud tightness in the knuckle boss should also be checked. This may be done by shaking the wheel and feeling for movement of the stud end or nut at the knuckle boss. Worn or damaged ball joints and knuckles must be replaced.