727 Rebuild Woes: Oil Pump stator / drum air leak

"added a 25" end play shim between the two clutches"....If you mean between the drums, never insert more than one washer between the drums; an extra one won't stay in place. (over 2 feet is a LOT!) And never air check unloaded drums. (damages the seals). I see a lot of terms that I'm not familiar with..I guess we're supposed to know what you're talking about. Clutch basket, assembly goo, straight up rebuild ; I think maybe if the repair you're doing is as imprecise as your use of terminology, this thing isn't going to work very well for very long. Helpful hint: made up terminology will discourage others from chiming in.

Hmm. Let’s work backwards: I didn’t make up any terms. Assembly goo is a brand of transmission assembly lubricant made by Lubegard. I can post a link.
Perhaps due to my background in motorcycles, a “clutch basket” is referred to differently with automatics. The “basket” holds the steels and clutches. Anyways, that’s obvious.

Lastly, a straight-up rebuild implies installing every piece in a Master rebuild kit, seals, bushings, steels, clutches etc.

Lastly, clearly the “ was a typo, I meant thousands. IE 25 thousands or 25/1000 inches of spacing.

moving on: trans is assembled and works fine. I guess I had a higher bar for the smoothness of the air check.

Thanks others for the helpful insight.

I do have a small leak at the dipstick tube, need to adjust the bracket on the bell housing and seat it better.