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 07-11-2019, 07:46 PM   #1
Junior Member
 
Join Date: May 2015
Posts: 13
Allison 3000 MH code 35 00

Good afternoon everyone,

Last week while on a trip, my '03 Alpine 36FDDS, with the ISC 350, started shifting erratically. What it would do is while cruising at around 62 MPH is shift into 4th gear, then 5th and back to 6th within a couple of seconds. When it would shift into 4th, the "don't shift" light would come on. At first the shifts would happen only once every 15 miles or so. But, after a couple of hours, they started to happen every 15 seconds!!!!! I pulled over and did a visual on everything I could think of. When I got back on the road, the problem seemed to have gone away.
When it would shift into 4th, the transmission control panel, where it shows what gear I was in, would light ALL of the lights and then sometimes it would go into neutral.
After a minute or so of shifting every 15 seconds it would stop shifting and run smooth for up to an hour.
After a while, I noticed the shifts were consistent with the quality of the road, smooth road, smooth coach. Rough road, rough shifting. I could anticipate the coach shifting if i saw a rough patch in the road ahead.
I looked up the code 35 00 in the Allison book and it shows "Power Interruption".

It seems that this is being caused by a loose electrical connection. ?????

I just had the transmission serviced right before the trip.
Is there something that gets unplugged during the service?
If so, could it not have been plugged in correctly after the service?

I would like some information before I go back to the shop with a problem, to know if they could have caused the problem or not.

Thanks for your time and assistance.

Later, Jeff.
__________________

gnjeff.t 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 07-11-2019, 09:16 PM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 19,238
I don't think that servicing the trans would require loosening the electrical connection to the trans ; BUT; trans fluid may have gotten into the connector , during the work.

If you're not comfortable going under the coach to check the connection ; within 15 " of the trans ; I'd say get it back to the service provider.
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 07-12-2019, 08:57 AM   #3
Senior Member
 
CoCoDave's Avatar
 
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,400
Quote:
Originally Posted by gnjeff.t View Post
...I looked up the code 35 00 in the Allison book and it shows "Power Interruption".

It seems that this is being caused by a loose electrical connection. ?????
Hard telling what may have transpired during the transmission service. But "Power Interruption" is a fairly common failure mode. The 12 VDC wire pair from the chassis battery to the transmission VIM is a good place to start looking. Here's an illustration that may help.



FWIW
__________________
Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, 2018 GMC Acadia, Linux Mint
CoCoDave is offline   Reply With Quote
Old 07-12-2019, 10:23 AM   #4
Junior Member
 
Join Date: May 2015
Posts: 13
Thanks CoCoDave, for "The 12 VDC wire pair from the chassis battery to the transmission VIM is a good place to start looking."

Where is the VIM located on the coach?

Later, Jeff.
gnjeff.t is offline   Reply With Quote
Old 07-12-2019, 11:06 AM   #5
Senior Member
 
CoCoDave's Avatar
 
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,400
Quote:
Originally Posted by gnjeff.t View Post
Where is the VIM located on the coach?
On the three coaches we have owned it was/is located in the front run bay. That's the compartment below the driver's seat with an exterior door. My reading here suggests that many other coaches are configured in the same way. One exception I've seen is that the VIM and/or the ECU were located behind the panel next to the driver's left knee, below the shift pad.

The 12 VDC power wires are usually dedicated to supplying only the transmission electronics. They connect at or near the chassis battery and run to the VIM.

HTH
__________________
Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, 2018 GMC Acadia, Linux Mint
CoCoDave is offline   Reply With Quote
Old 07-12-2019, 06:56 PM   #6
Senior Member
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: May 2013
Location: Springfield, IL
Posts: 891
Jeff,

Allison default code 3500 references low voltage to ECM

Richard
__________________
2011 Itasca Ellipse 42QD; 2012 Buick La Crosse; Retired US Army MSG (20 years AFS); Evangelist; Professional Parliamentarian; Author
rrtribble is offline   Reply With Quote
Old 07-15-2019, 02:24 PM   #7
Junior Member
 
Join Date: May 2015
Posts: 13
I located the ECM in the front bay, in front of the passenger seating. I have tested everything in and out of the ECM without finding any issues.

I have not been able to find the VIM yet. I am guessing it is back next to the transmission as mentioned in an earlier post.

I will update when I have an update.

Thanks.

Later, Jeff.
gnjeff.t is offline   Reply With Quote
Old 07-15-2019, 04:05 PM   #8
Senior Member
 
CoCoDave's Avatar
 
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,400
I took this picture for another purpose but the VIM is visible toward the left side, above the air leveling compressor. The ECM is to the right but outside this frame. All of this is in the front run bay on our coach.

HTH
__________________
Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, 2018 GMC Acadia, Linux Mint
CoCoDave is offline   Reply With Quote
Old 07-26-2019, 01:01 PM   #9
Junior Member
 
Join Date: May 2015
Posts: 13
hello everyone,
I am still unable to locate the VIM.
But I have located the possible cause of the issue. There was a poor connection at the battery isolator. I have cleaned all three of the connections, took it for a short drive, and at this point all seems to be working correctly.

A big thank you to everyone how assisted me in working on this issue. If the issue pops up again, I will be sure post the problem again.

Later, Jeff.
gnjeff.t is offline   Reply With Quote
Old 07-26-2019, 01:46 PM   #10
Senior Member
 
CoCoDave's Avatar
 
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,400
Thanks, Jeff, for following up. Your fix, pending confirmation, sounds very similar to others here with similar symptoms. It stands a good chance of holding up. Good luck!

FWIW
__________________

__________________
Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, 2018 GMC Acadia, Linux Mint
CoCoDave is offline   Reply With Quote
Reply

Tags
allison



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 3000 vs Allison 2500 RJOL Allison Transmission Forum 9 09-29-2018 06:12 AM
Allison 2500 versus Allison 3000 JShireman Class A Motorhome Discussions 20 04-15-2018 05:49 PM
Error code on Allison 3000 in 2015 Dutch Star rg neumann Allison Transmission Forum 4 10-07-2016 07:29 AM
Allison still shuddering. Allison 3000 Mystery Allison Transmission Forum 23 01-18-2014 06:45 PM
Allison 3000 error code Dupdyke Monaco Owner's Forum 2 04-04-2013 07:27 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 03:54 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×