Originally posted by BigDogRacing
And one last thing- someone already mentioned this, but they were waaay off on the amount of shims (IMO). On the front oneway you need .3mm shimming the diff toward the shaft, and on the rear you need .2mm. Unfortunately, you will begin to feel a "tight spot" in the drivetrain as a result of the .3mm shim in the front, but there is no other choice right now. FYI- I know what the problem is, but I don't know an easy way to fix it correctly yet. Shiming the diff toward the shaft with a zero lash result is NOT the corect way to fix this problem, it is merely a temporary band-aid.
Agreed! I think the solution is better made gears. I'd love to see someone mill "proper" gears with perfect backlash for the Evo III and run them to see if they last.