I just remove the ball stud on my pitman arm yesterday. I ground down the peened end flush with pitman arm, but no amount of pounding would get the stud to start moving. I drilled out the center of the stud with a 3/8" drill bit, still no go. I then chamfered the ground down end of the stud (around the hole I drilled) with my dremel tool. Bingo, the stud easily came out. Both ends of the hole in the pitman arm were chamfered by the factory (the peened side more so than the ball side).
