Trans jumping out of gear

[Prather]

I have a Fuller RT-11609-A nine speed transmission that has been  jumping out of 8th gear every once in a while and everyone once in a while out of forth but not as often which is in the same shift position. Yesterday it seem to jumb out and then back in under load.  Any comments?  I am hoping it is just a linkage adjustment problem.    Any advice appreciated.   Prather

[boogiethecat]

Call Paul Meza at Valley truck and ask him.  He's very cool and an expert in this tranny.  I bought mine (an overdrive version) from him and have nothing but good to
say about Paul and Valley.
(559) 498-7744
He can repair them or sell you another good used one if you ultimately need it.  Sounds to me though, like it's internal.

Cheers

[HB of CJ]

Ouch....maybe you need a front half bottom end go-thru.  Yeah, it's high gear (also 4th in your case) that seems to get loose first.  Could be the gears (dog clutches) or possibly the bearings.  Is the tranny making any unusual noises it hasn't made before?  Do you have any warranty?  Afraid the only solution is to drop the Roadranger, take off the shift cover and take a look see at the insides.  In the meantime, do a lube oil analysis to see what is wearing out.  Good luck. 

[NJT 5573]

Sounds like a pocket bearing.

If its jumping out of high gear the bearing is on the front of the case and you just take a torch after your done beating and pulling on it, and cut it out and replace it with a new one.

You are going to want the trans out from under the bus if possible but I don't see why you couldn't change it under the bus if you had to. Just be careful with the torch.

A pocket bearing is just a bearing that supports one of the main shafts that is under load when you are in high gear. High gear loads are absorbed at the very front of a Fuller, "high" puts load at the very front of the case so the bearing you need to change will be easy to get to when you drop the trans. I never rebuild a Fuller, I just fix whats broke and change the oil. If you do it yourself, the bearing is not expensive. When you get it fixed try some Slick 50 in it, Fullers love Slick 50. (Just a quart).

[Sojourner]

Or bell housing to engine and/or transmission to bell housing bolts is probably loose.

FWIW

Sojourn for Christ, Jerry

[Prather]

I thought   I should follow up on this post.   Took the trans out and when I pulled the shifting cover I found the problem. It was one of  three springs broken on a detent ball.   Since I had it out tore it apart, checked bearings  etc. no problems, replaced gaskets, bought three new springs and  balls (cheap)   Trans worked just fine this summer.  In Missouri right now, heading back to FL the end of the month.     Prather

[DaveG]

Thanks for the follow-up...seems we always get involved in the symptoms and seldom in the solution.

Again, thanks for the follow-up.

PS keep oil level FULL

edited so it didn't sound like I was being mean to others.