hey kevin,
all you will need is the shims from the rear axles that go behind the roll pin from the tc3.i didnt supply this with my kits yet because i am working on a source for buying them.to make them in a small quantity(1000 or less)would not be profitable for me to do.it seems that AE didnt supply them with the TC4 either even knowing that you will need to buy them.i will hopefully have something soon.
thanks,
jason