Easiest 727/904 rebuild thread...
So I'm going to try and reiterate this several times. This transmission is just supposed to be a get it going on a budget kind of deal. Well I am going through everything and making sure everything is clean I'm only going to replace the absolute barebones minimum... And actually maybe even less than that LOL...
Now when I do the 727 for the big block I will be replacing at the very least every field gasket steel and clutch...
On this 904 even some of the stuff I'm doing now is more experimental than anything else to see what I can get away with...
If you're building one of these transmissions for your car to last a long time at the very bare minimum I would change all the clutches steels lip seals and gaskets.