Front Ball Joint Inspection

Ball joints must be replaced if any looseness is detected or ball joint seal is cut or damaged. To inspect ball joints, raise the front of the vehicle, allowing suspension to hang freely. Grasp the tire at the top and bottom, an 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 is detected, or if the ball stud can be twisted using finger pressure, replace the ball joint.

Ball stud tightness in the knuckle boss should also be inspected. 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.