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Mackpro

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Mackpro last won the day on January 21 2023

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  1. dlappleton5

    I seen from a previous post that you can find out if a Step 12B update has been done in the ECM.

    Can you still check this? Or direct me who can? 

    We have a 2007 Granite, running super slow. Last 6 # vin 061642. 

    Thanks!

    1. Show previous comments  1 more
    2. Mackpro

      Mackpro

      The speedo not working can cause the engine to derate for sure.  If a Mack transmission, check for loose or missing bolt/washer that holds the yoke to the back of the trans. Very common for them to come loose and fall out. Otherwise a faulty speedo sensor or wiring could be the issue. I’ll check with my buddy and get a answer on the software level for your truck. 

    3. dlappleton5

      dlappleton5

      Awesome. Thank you so much. 

    4. Mackpro

      Mackpro

      The miles are stored in the VECU Vechicle control unit and are displayed in the digital readout on the dash cluster . As long as VECU wasn’t wiped out and replaced the miles would be correct . 

    5. Show next comments  3 more

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