Jayco RV Owners Forum
 



Reply
 
Thread Tools Display Modes
 
Old 12-24-2016, 05:31 PM   #1
Member
 
Join Date: Aug 2016
Location: Palm City
Posts: 48
Allison transmission trouble

Hello all, Just ran 1300 miles. The Allison tranny in my 2008 Seneca started acting up. It seemed to slip out of overdrive. Next it started acting up in 3rd and 4th, shifting erratic. The speedo would drop to almost zero with every erratic shift. At one stop it would not shift into any forward gear for awhile. I checked the fluid and it is clear and did not smell burned. I shot the bell housing and it was about 130 degrees. The transmission warning light( open end wrench and trans icon) started blipping on and off but did not stay on. The rig has 36,000 miles on it. I have tried some forum troubleshooting and it sounds more like an electrical gremlin than mechanical. Any thoughts would be truly appreciated.
Thanks, Capt. Rich
P.S And a Merry Christmas to all.
__________________

Capt. Rich is offline   Reply With Quote
Old 12-24-2016, 06:24 PM   #2
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 5,845
Quote:
Originally Posted by Capt. Rich View Post
Hello all, Just ran 1300 miles. The Allison tranny in my 2008 Seneca started acting up. It seemed to slip out of overdrive. Next it started acting up in 3rd and 4th, shifting erratic. The speedo would drop to almost zero with every erratic shift. At one stop it would not shift into any forward gear for awhile. I checked the fluid and it is clear and did not smell burned. I shot the bell housing and it was about 130 degrees. The transmission warning light( open end wrench and trans icon) started blipping on and off but did not stay on. The rig has 36,000 miles on it. I have tried some forum troubleshooting and it sounds more like an electrical gremlin than mechanical. Any thoughts would be truly appreciated.
Thanks, Capt. Rich
P.S And a Merry Christmas to all.
Join this group on Yahoo and ask you question lots of KODIAK owners there

https://groups.yahoo.com/neo/groups/SuperCrvgroup
__________________

Grumpy is online now   Reply With Quote
Old 12-24-2016, 11:51 PM   #3
Senior Member
 
Dustdevil's Avatar
 
Join Date: Mar 2016
Location: Orange County
Posts: 611
I agree that it does sound more likely to be electrical than mechanical. Wouldn't have a clue where to start, though. There are diagnostics built into the sophisticated code reading equipment usually present at the larger medium duty truck dealers. Unfortunately, they are also quite proud of their services.
__________________
2006 Jayco Seneca 34SS
2006 Jeep Wrangler Unlimited Rubicon Toad
Dustdevil is offline   Reply With Quote
Old 12-25-2016, 08:47 AM   #4
Senior Member
 
Join Date: Nov 2015
Posts: 1,036
It could be as simple as a comm failure between a sensor connected to the Allison and the TCM. Or just disconnecting and reconnecting the main bus may also prove to be the solution.

The Allison transmissions are known to be rock solid mechanically and of the 3 we've had of different generations and sizes, not a problem one.
We did think we had a problem with the 3000 in our diesel pusher but it turned out the bucking and lunging was dirty fuel filters on the Cummins engine.

The Seneca has the Allison 1000.

Let us know what you find is the problem.
abarkl is offline   Reply With Quote
Old 12-25-2016, 11:18 AM   #5
Senior Member
 
Join Date: May 2016
Location: Way down here........FL
Posts: 1,349
I do NOT have a motor home, but my truck did that type of thing one time. It turned out to be some kind of sensor needed replaced.

Good Luck
jasum is offline   Reply With Quote
Old 12-27-2016, 03:31 PM   #6
Member
 
Join Date: Aug 2016
Location: Palm City
Posts: 48
Hello All,
I replaced the speed sensor to no avail. Now the trans won't shift into any gear. It shifts and then when you go to accelerate it goes into neutral. I am having her towed to a Chevy dealer tonight. Is there anything I should do in particular before it goes on the hook?
Capt. Rich is offline   Reply With Quote
Old 12-27-2016, 03:53 PM   #7
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 5,845
Quote:
Originally Posted by Capt. Rich View Post
I am having her towed to a Chevy dealer tonight. Is there anything I should do in particular before it goes on the hook?
Go directly to ALLISON. When we had our SENECA I was told Chev couldn't work on it, had to go to ALLISON.
Grumpy is online now   Reply With Quote
Old 12-28-2016, 05:30 PM   #8
Member
 
Join Date: Aug 2016
Location: Palm City
Posts: 48
Towed the rig to an Allison shop. He did a diagnostic on the TCM and it showed no power. He disconnected it and bingo everything shifted and no service trans light. I told him I did that the day before and nothing happened. He said it could be an ignition lead, battery lead and one other I can't remember. He thought the problem could be fixed but gave no assurance. He said the Duramax wiring is the weak link. The trans itself is fantastic. He did not charge anything which was good and bad because he did not think he resolved the problem.
We started south at 3:00 today. Made it 20 miles and the trans started to do the same thing. We limped in to a Chevy dealer and the tech said this is sort of a common problem with the Kodiak Topkick. He confirmed what the Allison tech said about the poor wiring harnesses. They will look at it tomorrow.
Adventures in RVing. to be continued!!!
Capt. Rich is offline   Reply With Quote
Old 12-28-2016, 05:44 PM   #9
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 5,845
Quote:
Originally Posted by Capt. Rich View Post
Towed the rig to an Allison shop. He did a diagnostic on the TCM and it showed no power. He disconnected it and bingo everything shifted and no service trans light. I told him I did that the day before and nothing happened. He said it could be an ignition lead, battery lead and one other I can't remember. He thought the problem could be fixed but gave no assurance. He said the Duramax wiring is the weak link. The trans itself is fantastic. He did not charge anything which was good and bad because he did not think he resolved the problem.
We started south at 3:00 today. Made it 20 miles and the trans started to do the same thing. We limped in to a Chevy dealer and the tech said this is sort of a common problem with the Kodiak Topkick. He confirmed what the Allison tech said about the poor wiring harnesses. They will look at it tomorrow.
Adventures in RVing. to be continued!!!
Their comment has me really wondering. Having owned a 2008 SENECA, that I put 55,000 miles on, as well as knowing over 50 other owners with all year KODIAK DURAMAX Super "C"s no one else ever mentioned that problem, or wiring issues in general.Also when I had my unit in for service at a medium duty dealer they always talked about how " bullet proof" the 5500 was. That comment was also echoed at the allison shop when they serviced the trany.
Grumpy is online now   Reply With Quote
Old 12-28-2016, 05:55 PM   #10
Senior Member
 
Join Date: Nov 2015
Posts: 1,036
Quote:
Originally Posted by Capt. Rich View Post
Towed the rig to an Allison shop. He did a diagnostic on the TCM and it showed no power. He disconnected it and bingo everything shifted and no service trans light. I told him I did that the day before and nothing happened. He said it could be an ignition lead, battery lead and one other I can't remember. He thought the problem could be fixed but gave no assurance. He said the Duramax wiring is the weak link. The trans itself is fantastic. He did not charge anything which was good and bad because he did not think he resolved the problem.
We started south at 3:00 today. Made it 20 miles and the trans started to do the same thing. We limped in to a Chevy dealer and the tech said this is sort of a common problem with the Kodiak Topkick. He confirmed what the Allison tech said about the poor wiring harnesses. They will look at it tomorrow.
Adventures in RVing. to be continued!!!
Hang in there and thanks for the update Capt. Rich!
__________________

abarkl is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 07:53 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.