Auto Systems and Repair: Lower Ball Joint Replacement
Without the pivoting motion afforded by the ball joint, steering a vehicle would be impossible.
When a ball joint wears, it develops excess clearance. A worn ball joint may develop a creaking sound when the suspension moves up and down while driving on an uneven road surface.
To replace a worn ball joint, the wheel is removed, and the ball joint is separated from the steering knuckle or suspension. Then the hardware securing the ball joint to the steering knuckle or suspension is removed, and the ball joint is replaced.