How to Replace Ball Joints - AutoZone
https://www.autozone.com/diy/suspension/ball-joint-replacement
WEBA ball joint’s job is to hold the entire suspended weight of the vehicle on its steering point. Basically, when your wheels turn left or right, the ball joint, or ball joints on each side are allowing this to happen. They keep the wheel/tire in correct alignment, while allowing the steering components to turn smoothly.
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