Easiest 727/904 rebuild thread...
So let me make this clear about this 904... I'm not doing anywhere near a full rebuild just freshening up anything that looks like it should be replaced. Definitely front pump seal definitely rear main seal and the pump gasket and the tail housing gasket. Everything else is going to go through a bit of an inspection and anything that looks like it can be reused will be. This isn't a transmission I plan to keep for long it's just for a temporary project...
When I get back to the original 727 short shaft I plan to put behind the stroker motor in my personal restoration truck that is going to be almost everything internally replaceable new..