Lee - the 3/4 and 1T punkins are interchangeable, but a 57 3/4T isn't "3.70ish", it's 4.57, which is the same as the stock TF 1T, so I'd expect your 55.1 1T to be the same - I think that's what your askin? the 1/2T is 3.90, but a different rear axle
Bill
