Inspection of a 904 torqueflite

Something I want to add to this for ease of use when other are shopping.

WIT TRANSMISSION website is not the easiest to navigate.
However. If we look at the exploded view of the transmission. We find number assigned to all the parts.

Like a clutch seal......which you cannot find individually anywhere outside a kit.. one of the seals is 336.....another is 337
A snap ring is 889

If you put a 12 in front of any number assigned
Like 12336 or 12889 in the search box. You can individually buy almost any part for the 904 from them.

I thought I’d share that with anyone who didn’t know.
The snap ring is .07 cents plus shipping. The governor rings seals are $1.95 and come in but joint or lock joint.

However.....my transmission has both. I’m going to replace those back there as well as the output shaft support because the ring seals dig into the support. I don’t know why it did that but it concerned me.


I think this is due to governor moving back and forth and having excessive end play. I have not found why there is so much okay here and what could be worn out yet. I don’t think it’s the snap ring. They showed op @ .050 for both transmissions and the 904 had .010 less than the 999 which was worn out. Personally....I might be chasing nothing....I don’t know but I want this to be right the first time. I also would like to know if I should re use my rings for the accumulator and rear servo or buy new ones since I’m replacing those

As far as the gear train end play. I’m going to reduce that from .30 to closer to .020

I can’t say how either of these transmissions were taken care of which is why I went to the level of rebuild I’m doing....and that includes bushings. I bought 2 sets of bushing installers all the way up to 2” and down to 3/8 of an inch. I have a press as well somtjat should help.

I wanted to make sure the journals were riding in bushings that were not worn down and closer to tolerance I can’t measure so I’m hoping for the best......and I just wanted to have the expertise of putting them in.....

so both transmissions are getting new bushings, washers, clutch frictions, gaskets and seals, 2 magnets in each pan...as well as red lined new bands

the 999 is getting a tf2, billet rear servo piston, billet accumulator, and a thicker band strut......I also bought a deeper pan with a drain plug and a filter extension as well as a transmission cooler for the front of the radiator. I’m hoping all this will help keep this thing in good shape and the fluid cool.

I’m taking my chances on the lock up converter as it’s 5 years old. It will be cleaned out with kerosene. I’m hoping the clutch isn’t worn out. The black fluid I found had to come from somewhere and the wear on the other parts might not have been enough. I’m not sure.

The lock up clutch will be automatically activated by governor pressure feeding a fuel safety cut I’ve valve connected to a relay that activates and de activated the clutch at whatever speed I think is good. Can than trailbeast for that one.

And that’s about it. It led me much farther than I thought it would and totally trashed my budget for the year but that’s how it goes. Adding a set of GtS hub caps didn’t help with that either.

I will test both transmissions and probably sell the 904 after it’s done or keep it as a back up.....but I don’t usually keep parts around.

The deal is that I know in the future how I will maintain these and what has been done to them. I know the fluid will be changed on a regular basis and the transmissions won’t ever leak while I have them. It was best to just go all out and know what I’m dealing with.