5 Rick Stivers T-90 Transmission Rebuild Guide Disassembly Part 2

[@kent7927]

I love youtube, because of video's like this i fear not! THANK YOU RICK STIVERS!

[@NickGarm]

Thank you Rick!! Replacing my case now due to an overzealous "mechanic" who broke that (hidden bolt) ear on the transmission. Your videos and writeup is the 'go-to' guide on T90 transmissions - great legacy for you!

[@johnyeash5603]

And assembling the 1090 transmission, we are having difficulty and moving the oil collector out-of-the-way. Any recommendations are seems like it has a much higher wall on it that is contacting three of the teeth of the gear preventing us from moving it out of the way.

[@johnyeash5603]

Sorry I did not proofread but it is the T-90 transmission.

[@rickstivers3965]

If it is the one that came out it should fit if you wiggle and adjust it. If it is an aftermarket oil collector you may need the shave down the rear edge a little. Some of them are made a bit too large. I have seem some that people have trimmed all the way up to the curve. It’s okay to trim some away if you need to.

[@johnyeash5603]

@@rickstivers3965 It is the one that it’s in the transmission. We are unable to get it out. If we can get it out, we would be able to shave it down. It obviously had to go in somehow but I cannot figure out how. Ours has a higher lip on it and a few teeth on the gear preventing us from moving it out of the way.

[@mikehouse71]

Hi Rick awesome tech guide and video! I am assembling my T90 right now. All is going as planned thanks to your help. When assembling my synchro clutch onto the main shaft I noticed that synchro clutch assembly seemed a little tight. I can make it move back and forth within its limits but it just seems too tight. I took it back apart and made sure that it moved freely with the springs and plates removed and it does. I put it back together and it still seems a little tight. Is this ok? Thanks for the help. Mike H

[@rickstivers3965]

Mike House Yes that should be fine. Remember that the shift tower gives you an awesome amount of leverage. If you can still get it to travel it’s complete distance, it should be fine once you have the tower installed.

[@OldCrowsClassicCars]

I have the T96 with OD. It seems the bolt pattern and input shaft are the same. Care to verify? I have 1'' OD and 10 teeth on the input shaft, and the bolt pattern is 4in vertically and 6-1/4in horizontally center to center.

[@rickstivers3965]

Old Crow's Classic Cars Sorry, I know nothing about the T96.

[@OldCrowsClassicCars]

@@rickstivers3965 NO, I'm asking you to share the bolt pattern and input shaft OD and teeth count on your transmission. ;)

[@Mr112kris]

Hi Rick, The gearbox does not want to stay in third gear when I drive the Jeep. Thanks ,Kris Belgium

[@rickstivers3965]

Kris, Is this a rebuilt T90 or an old one. If it is old I would venture to guess the front main bearing is worn out.

[@Mr112kris]

@@rickstivers3965 It is an old one...

[@rickstivers3965]

In that case it most likely either the front bearing or the mainshaft pilot bearings. Prior to that you could remove the shift tower and verify the detent ball spring isn’t broken. If it isn’t the spring you are due for a rebuild.

[@mikeperry5595]

i cannot get the main gear out after dropping the countershaft to the bottom of the case. i have no oil collector. the mainshaft is getting hung up on the countershaft even though the latter is at the bottom of the case. it looked so easy on the video.

[@7CAJONEZ]

Similar to a T-86. Studebaker manual says to instal cluster gears, shaft, needles, washers and then install output and then input shaft and THEN install input shaft bearing. Nothing abouf how to install input shaft bearing without beating or pressing which could destroy brass synchronizer. It does say to use special tool to protect synchronizer ring. Cant imagine what that is.

[@rickstivers3965]

You might try heating the bearing in an oven to around 300 degrees then immediately try to slip it on the shaft before it cools. I’ve never tried that but I have done it the other way by freezing the shaft and sliding the gear on. If I tried the oven I would clean out all of the oil and grease prior to putting it in the oven. I guess you could try using a freeze spray to cool the shaft and try slipping on the bearing.

[@7CAJONEZ]

@@rickstivers3965 Thanks for replying I have an idea for a tool that holds the shaft away from the synchro and use the 3 TO bearing cover holes to push the bearing on.

[@JacquesDufrene]

My cluster gear counter shaft isn't budging at all, could I have missed a step?

[@rickstivers3965]

Jacques Dufrene, As long as you are pushing the intermediate shaft toward the rear and the transfer case is removed, the shaft should come out. However, if you or someone before you tried to drive it out with a steel punch, the end of the shaft could be mushroomed out trapping it in the case. The shaft should only be driven out using brass or wooden rods. The locking plate at the back can bend but it will not prevent the shaft from moving backward.

[@JacquesDufrene]

Rick Stivers thanks for your reply being so fast, I thought it would have taken a day or two. I've actually just now pushed it through and I'm working on getting all the little pieces together. Thanks

[@stijn501]

wow what happend with the t90 case did u weld it or something?

[@rickstivers3965]

stijn501 Sometime in its long storied history it cracked along that edge. Somebody with really good skills brazed the crack closed. We drove it for many years like that prior to the tear down.

[@stijn501]

yeah my t90 broke on a spot where the bolt should go in just bought myselve a new one no hope in welding that one shut :s

[@mikeperry5595]

i guess i meant getting hung up on the cluster gear.

[@rickstivers3965]

Fear not! Let me know if I can help in any way.

[@OldCrowsClassicCars]

Hey Rick, I have the T96 with OD. It seems the bolt pattern and input shaft are the same. Care to verify? I have 1'' OD and 10 teeth on the input shaft, and the bolt pattern is 4in vertically and 6-1/4in horizontally center to center.