In the middle of a gear swap for my M1008. couldn't get the pinnion to press out on my harbor freight mickey mouse press, so I took it to the local tranny shop to give them a crack at it, thier 30-ton didn't like it either, so its in an oven overnight to hopefully loosen it up. Got home and figured maybe I could use the cage off my spare 14. It would slide in but not at the correct position and wouldn't clock into place either. Are these supposed to be interchangeable or were they bored in place, and it's one to one?