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Thread: ECM TCM Tuning question

  1. 4 Weeks Ago #1
    6cummins
    6cummins is offline
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    Aug 2011
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    Default ECM TCM Tuning question

    I have noticed that Final Drive H0103, Rear Axle Ratio H0122 and Tires Revs Per Miles H0136 do not match between my ECM and TCM. Does anyone know if this is an issue? I recently changed rear end gear ratios and curious if I should change everything in the TCM to match.
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  2. 4 Weeks Ago #2
    Woody35
    Woody35 is offline
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    Default

    Its an Allison thing. Its how it came from the factory. I wouldnt change it.
    2016 LML
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