Ball joints are the hardest working suspension part. They move up and down with every bump and swivel left and right with each turn. The front, lower ball joints have the toughest job because they ...

CARS.COM — Worn ball joints allow too much movement in the suspension, so the driver may feel more vibrations — or hear squeaks or rattles on bumpy surfaces or when turning — caused by looseness in ...

Ball joints act like hinges and connect the suspension control arms to the steering knuckles with a rotating, spherical stud and a socket, giving the wheels a wide range of movement -- from side to ...