Hello,

I have some 4 spd transmissions that need to be rebuilt. They've been sitting around for years and have a little surface rust on the input shafts. The rust is quickly and easily removed with a wire wheel but there is very light pitting left behind.

I don't have a good way of posting a picture, but can anyone give me an idea of how much pitting is too much? Or, said another way, is there even such a thing as an acceptable amount of pitting?

Also, which is better able to accommodate input shaft flaws: a pilot bushing or a pilot bearing (the MP bearing that seats in the crank register)?

I understand that this is a bit nebulous, so thanks in advance for any input.