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  1. R

    Allison 5sp: Allison trans throwing codes

    Well the Allison Service Center said it was not a transmission issue, a good thing I guess, they did not have the capability to work on the Duramax, and reccomended that I take it to the dealer. Dropped it off Friday afternoon, of course they are closed for the weekend so hopefully I here...
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    Allison 5sp: Allison trans throwing codes

    Redbowties, that sure is an interesting pic. Im not sure what an EFI is, and I do not know anybody with a Tech 2 scanner. Of the two connections I had both said to replace the NSBU switch. I also replaced the Input turbine sensor today as well, neither had promising results. Do to this truck...
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    Allison 5sp: Allison trans throwing codes

    Rgullett83, I am in Trenton, Michigan. I talked to the dealership yesterday they are pretty much useless, they wanted me to bring in the truck for service and would'nt give me the time of day for any questions. I've got a couple of calls out to other connections, and waiting for their response...
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    Allison 5sp: Allison trans throwing codes

    Wow, no offense here, but I just looked up the Tech 2 that is quite a pricey little tool. are there any other, options other that taking it to a dealer. I can buy a lot of chickens at that price.
  5. R

    Allison 5sp: Allison trans throwing codes

    Thanks for the reply. Visually checked both wheel speed sensors they looked good so did the wires, plug contacts did not look corroded. Is there a process to check them further? I was also able to duplicate the message on the display panel it read "Range Shift Inhibited". I need to check the...
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    Allison 5sp: Allison trans throwing codes

    First of all hello to everyone. My 2003 D/A started throwing codes yesterday. The codes that I have are P0500, P0700, P0717, P0721, and P0726. This started after I let my wife use it for a few hours. The Transmission feels like it is slipping, and the speedo shows 10 mph while in park or stopped...
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