Inspection of a 904 torqueflite

With the accumulator and servos.

Do you re hone those if your putting new ring gaskets in them. Teflon or cast iron.

I have a new accumulator and a new rear servo with new rings. The front is original but I have new rings for it.

Also. Where I did thread that hole for the pipe thread. Not that it matters now, but I threaded that tap all the way through. Soits the biggest diameter it can be.


However.....I see what you mean by tapered. I saw some of this when looking at the design of pipe thread, but it was too late.
Now I have a good understanding of it and what you mean by going in halfway.
For this one....now that I know that. I’ll make the hole for the Allen wrench, smaller than the hole for the plug and go with a standard plug that has a seat. I can see myself stripping out a pipe thread in the aluminum with even a slightly smaller hole behind it. If the pipe thread had a shoulder on it and a stopping point. I would trust it a lot more, but I don’t want to have an external shoulder. I’d rather have it sit flush and inside the hole like yours is. I learned something here. A few things actually.

Messed it up but now it makes sense. I would not have thought of using bar stock. As much as that makes sense. I still wouldn’t have thought of it, so I appreciate that and the detail you explained it.

I’ll see tomorrow what I can do. I’m out of my skill level on this one, but I still think I’m going to try it.

I am working on two of these torqueflites at the same time.
I messed the other one up worse but I think it can be saved pretty easily with the modification the way you showed it.

I’ll post a picture of it for the heck of it. I’ve learned a lot so far about these and personally, I think transmissions are more difficult than engines. This is a pretty big crash course and one of the reasons I’m taking so long with it is the research.

The other day.....a member from here talked of mixing the 999 and the 904 output shafts and some of the components. I was going to use the 904 output shaft with 999 gear sets on it.

they looked similar and measured out the same. He might have just said mixing the 904 rear planet with the 999 sun gear.

He told me that he did that a few years back and the results were not ideal. Had I don’t this......I would have been walking home in short order.

I’m keeping all the original parts with all the original parts. I wouldn’t have otherwise.

The 904 output shaft has less play on it than the 999 sand there’s no real way to take the play out. So I’m just gonna live with it and it should be fine.

Either way.....I’ve come a long way since I started this.
The play you are talking about with the parking gear/governor assembly I do not believe that matters. If the sealing ring is falling out of the output support because of an extra .010 of play then something else is drastically wrong. If the output support is grooved then you need to replace the support.
The total output shaft end play will change when the trans is fully assembled.when you measure the input shaft end play the output shaft become part of the equation.