I replaced the seals, no press needed, just large C-clamps.
And after thinking everything through, I used the wrong input shaft, I believe that's the only part that's different. I still have the original one, so I'll swap it out sometime after Christmas unless I get it mailed down here.
Quick Question, is the pump and input shaft the only thing that's different? I just want to make sure I didn't swap anything else that might cause issues.
What I used.
New Seals from a rebuild kit, also had new clutches, metal spacers (between clutches).
Used Original Pump, piston retainer assembly, clutch assembly, and valve body.
Things I used from the newer transmission (what I remember off hand)
input shaft and piston retainer and low and reverse drum was used along with the planetary gear assemblies. I believe everything else was re-used or swapped out with the rebuild kit. I can't remember if I used the piston retainer for sure or not, but I'm thinking the newer style was used.
I just want to clarify, that the low and reverse drum was used because the original one was only wearing on the outer portion of where the band sits, so it wasn't sitting flat on it. Also, it had at least 5 "balancing" holes in it whereas the 85's had no holes to balance. I'm not sure if that part is the same overall or not though.
The 77's transmission
I've been using this to guide me as far as the differences. I used a Chilton's Automotive Service manual to guide me in the rebuild. It has full breakdowns, but of course being from the 70's, never mentions that the newer ones were different, so that's a mistake on my part. But at least an easy one to fix.http://www.ihpartsamerica.com/forums/transmission-tech/2516-t-407-tf727-variations-parts-differences.html