Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Allison Transmission Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 06-28-2019, 09:47 PM   #1
Join Date: Nov 2018
Posts: 87
Mechanic says trans output seal leaking

When picking up my 2003 Fleetwood Excursion 3126B (Cat 330) for an oil change I was advised the my trans output seal has a leak. Was also advised that it wasn't a big problem - to have it looked at in a future service. 5K since trans fluid changed (and both 2" filters). Still reads OL-OK on level check.

Question - if this is needed in the future, is this a big job? costly? What is the trigger that says it needs to be changed? The coach has 18.5K miles.

Thanks. Paul
PDickson is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-29-2019, 06:13 AM   #2
Senior Member
Join Date: Jul 2014
Posts: 28,930
I would have it changed if it starts leaving a dime sized drip under it while parked for a day or so.
If you let it go, you will have an oil & dirt coating under it as it leaks, going down the highway.
twinboat is online now   Reply With Quote
Old 06-29-2019, 06:24 AM   #3
Senior Member
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 4,573
I would have the seal changed ASAP. It isn't going to heal by itself. A fairly straight forward job which should be completed in 2 hours or less. The seal is not expensive.
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
LETMGROW is offline   Reply With Quote
Old 06-29-2019, 06:49 AM   #4
Senior Member
Hit_the_Rhod's Avatar
Join Date: Oct 2014
Location: Salvisa, KY
Posts: 4,158
Personally, I would get underneath first and verify that it is indeed "leaking". If there are any signs of an actual "drip", I would change. If it is just a small damp area, with no active "leaking", I would monitor and leave it be. Case in point, the pad where the hydraulic pump attaches on my 3126b has a wet spot at the mating interface. It was pointed out to me when I had the coach inspected prior to purchase. The mechanic recommended against replacing, stating that it could go for 20 more years and never become a problem, and it just wasn't worth a repair that his company would charge around $400 for. It's been 5 years and 40k miles since I was told that, and it hasn't gotten any bigger, so I just monitor and drive on.
Scot & Laura Kellersberger
Newmar 4 wheel drive Dutch Star 3891, 2019 F-150 Toad. U.S.Army (ret)
1985 - 2006
Hit_the_Rhod is offline   Reply With Quote
Old 06-29-2019, 08:14 AM   #5
Join Date: Nov 2018
Posts: 87
Leaking trans seal

All good points - thanks. I will watch closely - if I see any active drip I will certainly change the seal. If it looks wet, but no drip I would also agree that this may be leaning too much forward. Thanks for your thoughts. Paul
PDickson is offline   Reply With Quote
Old 06-29-2019, 09:04 AM   #6
Senior Member
CoCoDave's Avatar
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,408
Just had that done two months ago. The leak was called out over two years ago during routine maintenance and still had not reached the point where it was leaving puddles of fluid on the floor. The mechanic who did the work said it could go awhile longer before really needing replacement. Nevertheless, I decided to go ahead and have the seal replaced.

Total bill was $330.49 out the door. I'm sure it could have been done for less money around Eugene/Junction City, Oregon, but we're near the end of the line up here and there are not many Allison-savvy shops. And I wanted to do it when we were not traveling.

Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, Sold - Retired From RV'ing, Linux Mint
CoCoDave is offline   Reply With Quote
Old 06-29-2019, 06:52 PM   #7
Join Date: Nov 2018
Posts: 87
Thanks for the piece of mind

Very happy to hear that this seal change is not such a big job. Love it. Will work on this when we are done with our 8-month full-time adventure. In the mean time I will closely watch the level. Have never seen a drip to date. Good feedback. Thanks. Paul
PDickson is offline   Reply With Quote

leak, seal

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Trans says 3 qts low bubby124 Monaco Owner's Forum 16 08-11-2016 05:20 PM
RV Mechanic says a 24' Georgie Boy is rare, maybe collector item. Thoughts? jturkish Vintage RV's 10 07-01-2013 10:05 AM
Checking frequency output and voltage output of Onan 5000 Genset Generator. MajesticRV MH-General Discussions & Problems 4 11-07-2012 11:16 AM
Rv mechanic or auto/truck mechanic? natureboy68 Class A Motorhome Discussions 13 08-09-2012 03:19 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 04:57 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.