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.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-28-2015, 08:44 PM   #1
Senior Member
 
ziaptrn's Avatar


 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Mar 2004
Location: Silver City, NM
Posts: 186
3000MH Transmission Service

Hello all ....

No real need, here; I just wanted to offer feedback on servicing the Allison 3000MH transmission which I completed recently.

The rig was filled with and running on Dexron III, and I switched over to full synthetic, with the understanding that I need to change the fluid and filters again in 1 year (after speaking with Allison directly) before tackling prolonged service intervals with synthetic.

I took a spin around town to get everything up to operating temperature, and then drained the transmission and removed filters. I did not use jacks or anything; I could fit underneath without too much trouble. Lots of splashing oil, but no difficulties. The old gaskets removed with no trouble at all, and I used a clean rag to wipe down all of the contact surfaces before re-installing - no scraping needed with plastic tool or anything else. I did let it sit a good 45 minutes before the oil stopped dripping out. No particulate or shavings or discolored oil noted. The transmission was fine before; this was mostly to establish a baseline (no data available for previous care), and to switch to full synthetic.

I drained 18 quarts of fluid and replaced the same amount, and used a torque wrench to get the right specs for the drain and filter housings (2 different specs). After refilling and again running to get up to temp, the electronic measure at the shift pad reports "Ok"...even though the dipstick shows a touch over the mark for "full"...so there is either a discrepancy or I'm within tolerance(s). I crawled back under to check for any leaks/etc. and everything looked fine.

Total time: about 3 hours (including shower afterwards!)

Not too difficult of a procedure, though intimidating at first. Directions that came with the Allison filter kit were spot-on.

Thanks to everyone for sharing their experiences; it is nice to be amongst a group of such nice folks who are willing to share.

John
__________________

__________________
John S
2004 Winnebago Vectra 40KD DP
Cummins 350hp 8.3 ISC
Towing 2013 Chevy Captiva Sport
ziaptrn is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com 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 08-02-2015, 05:27 AM   #2
Senior Member
 
ftodaro's Avatar
 
Join Date: Feb 2015
Posts: 247
John i wanted to convert my trans over to the synthetic fluid when i brought it in to dealer to change and they told me that they could not do it because they did not have a pump to pump out the residual oil in the converter. so i would be mixing syn with the standard oil.
Did you run across that issue in the process?
__________________

__________________
Frank
2001 Itasca Horizon
24' Enclosed Car Hauler
ftodaro is offline   Reply With Quote
Old 08-02-2015, 06:06 AM   #3
Senior Member
 
Steve Ownby's Avatar
 
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,505
Quote:
Originally Posted by ftodaro View Post
John i wanted to convert my trans over to the synthetic fluid when i brought it in to dealer to change and they told me that they could not do it because they did not have a pump to pump out the residual oil in the converter. so i would be mixing syn with the standard oil.
Did you run across that issue in the process?

Allison doesn't recommend using the pump method. The official Allison sanctioned method is a double drain/fill. This requires a second drain/fill within the change schedule of non synthetic. After the 2nd fill, Allison considers the fluid to be 100% synthetic.


Steve Ownby
Full time since '07
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
Steve Ownby is offline   Reply With Quote
Old 08-02-2015, 06:27 PM   #4
Senior Member
 
ziaptrn's Avatar


 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Mar 2004
Location: Silver City, NM
Posts: 186
Synthetic Fluid Change

Hi -

Mr. Owenby beat me to it! (LOL).
Exactly what he said... Allison transmission said to change the fluid completely with synthetic, then wait 1 year, then drain again, and at that point in time it would be considered "switched" and the longer mileage intervals would apply (after 2 drain and re-fills including filters, both with synthetic).

They didn't say anything at Allison about draining the sump, and I didn't ask :-/

John
__________________
John S
2004 Winnebago Vectra 40KD DP
Cummins 350hp 8.3 ISC
Towing 2013 Chevy Captiva Sport
ziaptrn is offline   Reply With Quote
Reply

Tags
service, transmission



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
Poor customer service at La Mesa RV and no help from Winnebago azkunk iRV2.com General Discussion 18 07-24-2015 10:46 PM
Freightliner Oasis service center comes up dry PDXDisco Freightliner Motorhome Chassis Forum 25 06-06-2015 10:49 AM
Poor Service? rjsupersonic Ford Motorhome Chassis Forum 1 03-28-2015 09:59 PM
Annual Chassis Service Cost StevieG Class A Motorhome Discussions 42 05-11-2014 09:04 PM
Overfilled Transmission leaking chili's trip Workhorse and Chevrolet Chassis Motorhome Forum 11 03-09-2014 03:53 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:09 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.