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Thread: A-40 os 25941751

  1. #1
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    Default A-40 os 25941751

    Does anyone out there have OS 25941751? Or maybe a full flash of the 25836826 so i can change the OS. Thank you
    08 LMM CC Dually

    Canada

  2. #2
    Lifetime Member GMC-2002-Dmax's Avatar
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    You will need to seek a dealer and they will need to FULL FLASH/Reprogram the TCM with TIS, only a Cal Flash is available on the A40.
    www.mscservices.net


    Tuner of many, many Duramax and Cummins Diesels.


  3. #3
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    OK thanks. I was thinking we still had the option to change the folder in v7.5 to make it full read/flash. Ross had posted a while back.

    Anyone with just the Cal? I want to see if that will work for me.
    Last edited by LMMPerrona; January 19th, 2016 at 01:36 AM.
    08 LMM CC Dually

    Canada

  4. #4
    Lifetime Member killerbee's Avatar
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    Quote Originally Posted by LMMPerrona View Post
    OK thanks. I was thinking we still had the option to change the folder in v7.5 to make it full read/flash. Ross had posted a while back.

    Anyone with just the Cal? I want to see if that will work for me.
    I got your PM. It was posted, but I could never get full read to work. I imagine that others duplicated my result.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
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    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
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  5. #5
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    thanks for the help guys.
    I tried it with techII and no luck. my neighbor has an a40 tcm so i asked if i can read it. I did a full read for like an hour. after the read it said invalid checksum. I ignored it and full flashed mine. it all worked... TCM is back running. Thanks to EFILive, Keep up the good work.
    08 LMM CC Dually

    Canada

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