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Author Topic: Help! My transmission won't shift  (Read 352 times)

John Padmore

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Help! My transmission won't shift
« on: May 15, 2018, 07:34:17 PM »
I need to move the motorhome after sitting for 2 years. Allison says mode is on Service and won't shift gears. Can I get it to shift out of mode? I have an appt. With lazydays tomorrow for some work. Thanks. John.

1997 Patriot Ticonderoga 37'
Regards,
John M. Padmore
1997 Patriot Ticonderoga

Mike Shumack

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Re: Help! My transmission won't shift
« Reply #1 on: May 15, 2018, 08:24:26 PM »
John,
What transmission model do you have - the 3000?

How are determining the tranny is in Service mode? I see nothing in the Allision manual about this specific mode.

D you mean the "Mode" light is On? What happens when you push the Mode button?

Have you checked the fluid level?
- Mike

'05 Beaver Patriot Thunder 42ft, Vicksburg, CAT 525HP C13

John Padmore

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Re: Help! My transmission won't shift
« Reply #2 on: May 15, 2018, 08:37:03 PM »
No idea what model. The display above the mode button says service on. On the dash a light says do mot shift. Fluid level is good.
Regards,
John M. Padmore
1997 Patriot Ticonderoga

John Padmore

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Re: Help! My transmission won't shift
« Reply #3 on: May 15, 2018, 08:46:11 PM »
If I press the up down arrows at the same time the display changes to D 1 then 2 3 then 1 2. If I press the mode button the display says mode on 1 6 then 3 5 then d2. Anytime I press R or D it goes back to mode on service.
Regards,
John M. Padmore
1997 Patriot Ticonderoga

Roy Warren Co-Admin

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Re: Help! My transmission won't shift
« Reply #4 on: May 15, 2018, 09:00:16 PM »
I would call Allison again and ask them how to get out of this predicament and if they can't help, can they give you a mobile service tech who can help.  I know there is a box with 2 hidden fuses in the electrical bay for the transmission.  You must open that box to see the fuses. 
Roy
Roy Warren
2005 Patriot Thunder
Cat C-13

Dave Atherton

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Re: Help! My transmission won't shift
« Reply #5 on: May 16, 2018, 03:15:37 AM »
Hi Roy, there is a box location think is with the transmission ECM. It size is about 8 inches x 6 and
About 2 inches deep. The cover has eight screws and when removed you will see two rolls of relays
With a 10 amp fuse on each end. If your touch pad does not light in it will not shift and is a 10 amp fuse. In the relay group clearly marked is the trans neutral safety switch not getting power. Have run
Into this problem with snowbirds in desert leaving to go back north. Do not know where you are located but have Allison computer diagnostic software where I can plug into and troubleshooting
What is going on but really think you will find problem in the relay box. Dave Atherton Retired Cat
Mechanic

John Padmore

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Re: Help! My transmission won't shift
« Reply #6 on: May 16, 2018, 06:05:32 PM »
I am in Black Hawk colorado.
Regards,
John M. Padmore
1997 Patriot Ticonderoga

John Padmore

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Re: Help! My transmission won't shift
« Reply #7 on: May 16, 2018, 06:25:30 PM »
From what I gather the codes are
D1
35
16
Regards,
John M. Padmore
1997 Patriot Ticonderoga

David T. Richelderfer

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  • 2004 Marquis Sapphire 45, 505 hp C-12
Re: Help! My transmission won't shift
« Reply #8 on: May 16, 2018, 08:22:19 PM »
This may help.  Anyways, it's something to look at.  It has error codes for Allison transmissions.

http://www.rvtechlibrary.com/transmissions/shift_selector.pdf
David traveling with Leslie & JB
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Mike Shumack

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Re: Help! My transmission won't shift
« Reply #9 on: May 16, 2018, 09:15:40 PM »
There is a troubleshooting-repair manual here: https://elibrarywcl.files.wordpress.com/2015/02/diagnosticcodes.pdf

For the Code 35, subcode 16 it says:
Hopefully the cause was just the situation described in paragraph 1.
- Mike

'05 Beaver Patriot Thunder 42ft, Vicksburg, CAT 525HP C13
The following users thanked this post: George Harwell

John Padmore

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Re: Help! My transmission won't shift
« Reply #10 on: May 21, 2018, 08:10:41 PM »
Dave, I replaced the neutral safety switch relay and a couple of fuses that I thought might be adding to the problem but no luck. Still the same codes :D1 35 16. No other codes. Any other info to try would be much appreciated. Thanks.
John.
Regards,
John M. Padmore
1997 Patriot Ticonderoga