Originally Posted by morgoth

Most guys (including me) have build their cars with 1 shim on the opposite of the ringgear and 1 on the outside of the gearbox where the pinion is. I heard that in the update kits, there's no shim needed for the pinion. But I'm not 100% sure of that.

If you have backslash in some places and a little binding in some places, just run the car. Everything will free up after a few runs