Ball and socket joint The arm movement is possible because of ball and socket joint.
For the lower ball joint, remove the lower control arm and the ball joint seal. Press the ball joint from the control arm. Press the new ball joint into the lower control arm ensuring it is fully seated, install a new seal and the lower control arm.
what i know you can't take that ball joint to upper control arm but if you buy the upper control arm the ball joint comes with it.
The ball-and-socket joint of the shoulder allows the upper arm to be raised and lowered.
ball and socket joint
socket and ball
In an automobile, a ball joint is a spherical bearing that connects the control arm to the steering knuckle.
You have to take the control arm and ball joint to a shop and have them pressed together, otherwise it is easier to buy the new control arm with the ball joint already in it.
I believe you can change just the ball joint on the lower control arms , the upper ball joints come with a new control arm
If you mean the lower suspension arm (wishbone) ball joint, it is fixed into the arm. This means you need to replace the whole lower arm.
Control arm and ball joint are all one unit.
One type is a ball and socket joint that connects your arm and shoulder