Inspection of a 904 torqueflite

The problem with the play is the rear snap ring that holds the governor and parking gear on.

It’s allowing the ring gaskets to trash the output shaft support, or at least that’s the theory. It has .027 999 compared to the 904 which has .017 and had no wear on that support.

It was only the front ring and not the back ring of the two. The only way to get that play out that I could see was a thicker snap ring. Which is not available.....even from a&a

Or to find a shim that sits behind the parking gear or governor.

The only reason I was gonna let it go is because I’m not sure that it was even the cause and there is no specification on that movement.

And I can’t really tell for sure if that was the cause. I just thought it was excessive. Why the front ring diggin in and not the back. Who knows. Maybe it just got bound up and dug a hole and stayed there after the hole was started. It isn’t one of the interlocking ones.
It was a wide gap ring that put more pressure to seal better.

Crappy fluid could have caused it and just worn it down. In the rebuild I don’t think it was replaced.

I started looking at the parameters of how the lock up clutch engages in the different gears. The spark control computer has a lot to do with activation of that relay. It could have been moving the lock clutch in and out at the wrong times.

Trashed the transmission....
Then they had it rebuilt and didn’t fix the original problem so it started to trash it again. It would have made drivability terrible.

Since my
Lock up clutch is on a switch and won’t be used for anything except highway.....I don’t see a problem there.
It’s going to be set up on governor activated pressure switch at some point to make it adjustable and automatic.....but not like that spark computer. I want more control over it. That’s also just a theory. But as I saw nothing wrong with the inside of this trans. I don’t know what else it could be. The packs were perfect.
The steels weren’t burned at all. Something had to make that fluid black as it was and thin as it was.