Now I know why 904 was having issues

Thanks for the advice guys.

As detailed in an earlier post, my tranny troubles began with the car not wanting to move from a stop and as more throttle was applied, would suddenly grab (somewhat violently) and start moving. When car was fully warmed up after say 10 miles, the problem went away. Problem got worse so I decided to learn how to rebuild it.

This is going to be a full rebuild, frictions, steels, seals, front and rear bands, gaskets, sealing rings, probably bushings too. Will also be doing a TF-2 shift kit.

Fishy and Beast, the servo and accumulator bores are all nice 'n smooth, the pistons all look fine too. I measured the input shaft endplay at .045" before I started the teardown. That number is right in the middle of the specs. The pump looks ok and I can't fit a .0015" feeler guage between a straightedge and the pump body, inner/outer rotors. My theory is when the tranny was last apart (1989 from the inscription in the pan) the drum was already damaged and just cleaned up, a new band slapped in and reassembled. There's a lot of metal missing from that drum and there was virtually none in the pan/filter.

Pretty sure the drum is beyond resurfacing, it's worse than a badly worn brake drum or rotor. Where can I find one for a '71 tranny?

Parts cleaning question: So far I've been scrubbing and rinsing parts in kerosene, wiping dry, then blowing with air and bagging and tagging them. Some parts like the pump rotors and body are getting spayed with wd-40 before being stored. I'd think kerosene and wd-40 residue would be compatible with ATF. Some suggest a no residue cleaner like carb or brake cleaner. But then you risk rust. Opinions?? It seems like an endless amount of parts to clean....

Keep the advice coming gents.