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Topic: Transmission selector buttons (Read 972 times) previous topic - next topic

Transmission selector buttons

I have the 6 speed Allison 4060. More then 50 percent of the time when I push any button D, N, R, it does not take, shift. Push in hard, soft, whatever. It's like it does not make contact. Anybody else have/had this problem?

Jerry Hurley
Jerry and Nancy
1995--U295C
Fulltimers

Re: Transmission selector buttons

Reply #1 –
Jerry,

An unusual issue on the Allison shift pad.

Does the indicator window change to the proper/chosen gear, but the gear not engage, or does the shift pad window stay in the original gear?

Are there any stored codes in the Allison (pull out your book and using the up and down arrows and mode button, you can check for stored codes).  It is also on Allison's website: http://www.allisontransmission.com/servlet/DownloadFile?Dir=publications/pubs&FileToGet=SA3360EN.pdf

About the only thing you can do is to take loose and tightly reconnect the pig-tail coming out of the shift pad and also the two gang plugs on the Allison ECM.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Transmission selector buttons

Reply #2 –
Hi throttle engine RPMs will prevent going into D. Barry

Re: Transmission selector buttons

Reply #3 –
I had this issue on my previous GV and the read out would not show any selection. Spoke to an Allison guy and he asked wether the plastic buttons were hard or softish? Mine was hard. It seemed the protection cover would not allow the carbon contacts to work so I bought a new shift pad to replace.First get a hair dryer if they are hard and warm the pad up and try. When I took it apart I cleaned the contacts up etc and replaced and guess what it worked and stayed good all the time So I still have a brand new pad and this coach will most probably be the same part #. This may not be your problem but I would suggest you take it apart and have a look at those contacts. This is only if the pad does not read the selection (either F or Rev), but having said that I personally would still try to clean (very carefully too I may add) and see if things change.
John H
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Transmission selector buttons

Reply #4 –
Quote from: Barry & Cindy –
Hi throttle engine RPMs will prevent going into D. Barry

Yes, but in this case, the selected gear would flash.  In other words, when hitting "D", "D" would flash and the transmission would not go into gear.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Transmission selector buttons

Reply #5 –
Had same issue with 95 U280 with 3060.  Took shift pad apart and cleaned membrane with electrical cleaner.  Took care of my problem for less than $4.
Tom and Linda
1995 U280SE #4636

Re: Transmission selector buttons

Reply #6 –
It will not shift to any gear IF you have the cruise control on for warmup.
1994 U280, Build 4490
Deming, NM.

Re: Transmission selector buttons

Reply #7 –
Quote from: Twig –
It will not shift to any gear IF you have the cruise control on for warmup.

Yes, same as too fast an idle speed.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Transmission selector buttons

Reply #8 –
Thanks guys, I will try to clean contacts. Buttons are soft and push in fine, it is like they do not make contact about 50 percent of the time.... Jer
Jerry and Nancy
1995--U295C
Fulltimers

Re: Transmission selector buttons

Reply #9 –
Jerry,
    Mine does it once in while if the weather is cold enough, like around 30F*. Once it is warmed up it works so I'm staying out of the cold weather for my fix.
Good luck,
Rick
Rick

Re: Transmission selector buttons

Reply #10 –
On my 95 U320 I had the same problem. Took the shifter assembly apart and cleaned the membrane/circuit board with electrical cleaner, as others have responded, and it worked like new.
David Bethard
2003 U320 - 40ft. Build #6159
ISM 500hp
2006 Jeep Liberty CRD
2021 Honda Goldwing DCT

Re: Transmission selector buttons

Reply #11 –
After cleaning works like new......Jer
Jerry and Nancy
1995--U295C
Fulltimers