The driver’s side ball joint on my car went about a week ago. It seems to be getting progressively worse. I have a Mazda shop manual, which says that the control arm will have to be replaced. But, on http://www.carparts.com I found a ball joint for our cars for $31. I am wondering if anyone replaced the ball joint without replacing the control arm. Would I have to take the control arm to a shop to have the ball pressed in? Or can I punch it out with a hammer and punch the new one in?