HouseCallAuto 10/4/2012You have not mentioned any details that would confirm that you are using a ball joint press to install the ball joint. A ball joint service set is REQUIRED to install the press fit ball joint. There is no other way it will go in. Don't remove the arm, give a deposit to one of the larger chain auto stores like autozone or pepboys and you can use there lend a tool and give you a ball joint service set which is all you need. By the way, the ball joint you stripped out is now junk and you will need a new part.