Originally Posted by
Matt Trimmings
If you remove those and still plan on using the mip diff there is going to be an incredible amount of left to right movement in the diff. You would need to revert back to the stock diff/bones.
but if the bone is hitting the t-nut, removing those shims probably shifts the whole diff over enough to keep that from happening (well, doesn't stop it from happening but when it does, the whole diff moves so there is no bind). obviously not the way you want to handle the problem though.