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Open Roads Forum  >  Tech Issues

 > Transmission would not go into gear.

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BrucePerry

Cornwall NY

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Posted: 06/29/12 10:47am Link  |  Print  |  Notify Moderator

Never had this happen before. Drove the motorhome for about 300 miles, and made a stop at the rest area. When I started the mh back up, I disengaged the air brake, and hit the D button on the gear selector. The only thing that happened was the "6" blinked, and the "N" stayed solid. I have an Allison 3000mh tranny. I tried it a couple of times, then decided to turn off the rv and restart. Tranny worked fine after that, but I did see the service light (wrench) show up for a split second when I put into gear. I did make it to my destination with no other problems, but have a 400mile trip to get home in a couple of days. Figure I will have it looked at when I get back, but for now is there anything I should do or check?

beaverpusher

stanwood washington

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Posted: 06/29/12 10:52am Link  |  Print  |  Notify Moderator

I see no mention of checking the transmission fluid level.


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naturist

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Posted: 06/29/12 11:36am Link  |  Print  |  Notify Moderator

Totally unfamiliar with that rig or tranny, but fluid level would be my first guess, too. That's pretty common with automatic transmissions.





RognBon

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Posted: 06/29/12 12:26pm Link  |  Print  |  Notify Moderator

Had this same thing happen to me. The display showed a service code that indicated the idle speed of the engine was too high for the transmission to engage. I shut the engine off and restarted, then let it run for a couple of minutes. I pumped the pedal a couple of times and the idle speed dropped to normal and everything was fine. Has never hapened again.


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wolfe10

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Posted: 06/29/12 03:46pm Link  |  Print  |  Notify Moderator

RognBon wrote:

Had this same thing happen to me. The display showed a service code that indicated the idle speed of the engine was too high for the transmission to engage. I shut the engine off and restarted, then let it run for a couple of minutes. I pumped the pedal a couple of times and the idle speed dropped to normal and everything was fine. Has never hapened again.


Yup, my first thought too.

If engine idle speed it too high, the transmission will not (and should not) go into gear.

Have you used the up/down arrows to check for Diagnostic Codes? Takes 2 minutes from driver's seat using Allsion shift pad.

http://www.allisontransmission.com/servl........publications/pubs&FileToGet=SA3360EN.pdf


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BrucePerry

Cornwall NY

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Posted: 06/29/12 04:00pm Link  |  Print  |  Notify Moderator

thanks for the info. Im going to check the fluid level, I figured I would have had a message displayed for that since the computer seems to flash messages that are less important (such as def fluid temp too high). I will post after I check the levels and I will check for the Diagnostic codes (though after reading through the book I see that unless something major, there may have not been a code)

BrucePerry

Cornwall NY

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Posted: 06/30/12 07:53am Link  |  Print  |  Notify Moderator

Follow up: Fluid level is good.

BrucePerry

Cornwall NY

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Posted: 07/01/12 06:03pm Link  |  Print  |  Notify Moderator

Drove 375 miles home today, no problems. So I'm guessing Rpm too high. I will drop off to repair shop this week and see if they find anything.

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