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 10-16-2018, 01:23 PM   #1
Junior Member
Join Date: May 2015
Posts: 17
Allison 2100 Rough Downshift


We are the owners of a 2014 Itasca Solei 34T with a 340 Cummins and a Allison 2100 6 speed. Rig has about 18k miles. We pull a 2015 Jeep Grand Cherokee which is right at our 5K toad limit but when I've weighed the rig fully loaded on the CAT scales we were well under our GVRW by 1500# or so. Recently we took a week long trip up and down 395 in California which features a number of long climbs at high elevation. Rig ran fine except for whenever she would downshift to 3rd gear it would sort of buck about three times and then smooth out and continue climbing. Never really slowed down just had that rough 3rd gear downshift. One other time when we came out of a rest stop we were accelerating up hill and she held 3rd and would not shift into 4th for about 10 seconds and then finally shifted. Only did that once. Does it sound like a transmission issue? Thanks

2014 Itasca Solei 34T
2015 Jeep Grand Cherokee Toad
typerr 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 10-17-2018, 05:36 AM   #2
Senior Member
Join Date: Apr 2009
Posts: 456
Sounds to me like either the transmission was adapting to conditions it sensed and/or the bucking was a result of movement in the driveline/towing system. If there are no warning lights on or resulting transmission diagnostic codes present I would not be concerned at this time.
dbarton291 is offline   Reply With Quote


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
Allison 2100 verses the allison 1000 BobnMelba Workhorse and Chevrolet Chassis Motorhome Forum 6 03-21-2014 10:40 PM
Allison transmission harsh downshift luqutus Allison Transmission Forum 5 05-02-2011 08:31 AM
Allison 1000 wont downshift on hills j griff Allison Transmission Forum 0 05-18-2009 03:54 PM
Poor downshift on Allison on cruise control EasyDoesIt Freightliner Motorhome Chassis Forum 12 07-31-2008 01:07 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:35 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.