Originally Posted by
wallace
ok, I got out the ATSG manual and it is still a little confusing to me but here goes. There are 3 different pump assemblies, 1978-85, 1986-99, 1999-present. There are 3 different Forward clutch housings, 1978-85, 1986 only, and 1987-present. There are 3 different input shafts but they don't break them down. The input shaft you need should have 3 small sealing rings on it the third added ring is for the lockup function. The pump was changed in 99 to a gerotor design and looks to be superior to the previous offerings. The 99 and later pump, input shaft, and clutch are a dime a dozen in the wrecking yards. I would source all of those components from the same transmission and take the converter to use as a core for when you have the new one built. The manual states that the 99' and later assembly is backwards compatible. Hope that helps.