So my T-90 just started puking gear oil...

Yup, sounds like it's time for a rebuild. I had the same issues...but I let it go for a while (hoping it'd last until winter, then I'd rebuild it)...well, after another month of use (or abuse, maybe) the trans started getting pretty noisy, and oil loss seemed to get worst...so I pulled it out and have just finished the rebuild (still on the bench though, grrr) My trans definitely was in need of a front bearing, there was a lot of slop. Seems nice and tight now with new bearings and roller bearings throughout...and we'll see about oil leaks by the end of the weekend if I get my d18 back together and all of it back in the jeep. Good luck with your rebuilds.

 

mud hardening pushing gear oil out......

 

Steve you can open it up in a few minutes while its in the jeep , from there you can beat on it with a claw hammer ,,, no worries .. R)

Agreed its time for a redo

 

Hey, don't forget there is a video out there that walks you through this...had the link at one time but lost it...I need to do the same with my T-86. Does anybody have the link for that video?

 

R)

 

Hi,
One thing to check before you tear into the transmission... the t-90s are known for the shift rail plugs popping out, especially after off road trips. If oil is sloshed up into the shift rail bores it can pop the rail plugs out hydraulically as you shift into a gear. It can cause a heck of a lot of gear oil to come out the front or rear of the trans case.

Also, sometimes the hydraulic pressure in the shift rails can be enough to make these transmissions shift harder at times since you are overcoming pressure in the shift rail bores as you shift.

Some of the M-38A1 shift covers have threaded shift rail plugs at one or both ends of the trans case instead of the freeze plug style, like on most t90s. They also have pressure bleed holes drilled in the underside of the shift rail bores.

Hope this helps.
Daniel