All but 1 hole in the seperator plate is enlarged in the 4r70w in these cars. You will love the transgo kit. mine shifts perfect now. It comes with a good video and tells you exactly where everything goes. If you want some more detailed info about what you will get into when you do it, you can shoot me a PM. Gave me better shifts than the tuner did, but with the tuner it is nice and wicked.