A727 Rebuild kits redux - Rebuild kits everywhere (62-70 vs 71+)

vipertwo2 said

hello ,,,great thread.....i have a 69 727 that has striped safty ,light switch.. also leaks some wear i can't find... anyway it has a new rebuild with good stuff.(( less than 25 miles )...i have a 77. 727 trans..i know nothing about it,, but it looks dry ... no leaks..i want to use the stuff from the 69 into the 77 ...any suggestions would be app.. thanks tim

Click to expand...

There were quite a few internal changes between the 69 and 77 but the case is basically the same on both. As long as you swap the entire guts from the 69 into the 77 case you'll be fine. Only thing you might run into that could be different is if your car is an A-body with a factory floor shift, those cars have a 2 hole mounting eye that hangs down on the extension housing that the lower shifter bracket bolts onto. Not all 727's have that. If you need it you can use the extension housing from the 69 on the 77 case.

When you swap in the guts from the 69 make sure and check and set the total end play as it might differ from the cases. The book gives a ridiculously wide specification. I like to get it down to as close to .020" as possible so the parts aren't hammering each other on acceleration and deceleration. If you don't know you set it by the selective thrust washer between the pump and front clutch.