Eaton Transmission Jumps out of Gear

That's a syncronized 6 speed. Sounds like you have a bad syncronizer and possibly second gear. I've also seen them develop excessive end play on the mainshaft from bearing wear. They had shift cover problems too, but mostly would get stuck in a gear and wouldn't come out without removal of the stick and shift tower.

 

spot on bender!i service a fleet of these.common issues.

 

You will see visible damage to the 2nd gear syncro and 2nd gear. Also check the shoes on the shift fork. Get a repair manual to follow, you'll need it.

 

Follow the book and you'll do fine. You picked the best transmission to be your first, it's one of the simplest.

Thanks, yes, the kitty is doing well, those dang things do have nine lives!

 

I am having an issue with a newly rebuilt Eaton Fuller Mid-Range FS5406A. We just installed the trans, and the issue is the same before having it rebuilt by an experienced builder. The transmission continues to "pop" out of six gear, same concern as before. Anyone out there have suggestions/advice

 

I checked the ring gear on the differential for any damage as suggested by the builder, no damage present, and serviced the rear. differential road tested the vehicle, and the concern is still present.