Re: 4WD Truck 4L60E
looks like all the part numbers are the same except for some pistons and clutch packs. one major difference is the pump. in 96 is when they got the 13 vane pump. the pump body needs to stay with its case, there is a casting number on either the front or the back, the last 3 numbers need to be the same. the internals of the pump can be swaped though. another major change is the number/type of solenoids, 93-95 got 5 solenoids, 94-96 got 6, and 96 got 6 but one is in a different location(doing something else)
there are a few little changes in the valve body also. (solenoid bore sizes) in 96 they changed quite a few things
onething if you go with a newer style case you will need a th400 adapter(i think they are the same size /forums/images/graemlins/dunno.gif) a th350 adapter will both up to the older cases.