anyone know? tracking down a steering issue, i'm down to changing out the box, but all i got is a 2wd one. will the 4wd pitman arm physically fit the 2wd shaft, or is it different altogether? I know the 2wd is held on by a nut, and the 4wd has a bolt that tightens the arm on. I realize the 2wd one wont fit the 4x4 shaft since its setup for 4 keyways, but didnt' know if the 4x4 one would go the other way. search hasn't helped on this specific problem yet.