The easiest way is to provide enough info so we can answer ou: Turbo 350: 2.52, 1.52, 1.00 Turbo 400: 2.48, 1.48, 1.00 700r4: 3.06, 1.62, 1.00, .70 If it isn't one of these trannies then let me know which one you have or you can get on TCI's website. :TU: