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Thread: SERVICE 4WD At Startup - MM3 Fails At Startup

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    SERVICE 4WD At Startup - MM3 Fails At Startup

    2 issues.

    Issue #1----When I start up my 2017 ram 2500 6.7L tradesman G56. I get the "service 4WD" message and then it goes away.

    Sometimes over bumps I get the "4wd shift in progress" message when I'm not manually shifting it.

    Edit: any reason for the service 4wd message? truck recently hit 30k miles?

    Is a sensor going out? Could it be the actuator?

    Issue #2--- whenever i start my truck sometimes the MM3 Tuner will blink green and then red and i have to pull the plug from under the dash and then plug it back in for it to work.

    Any reasons why it does it 95% of startups?

    Last edited by Dtrust68; 09-28-2020 at 12:33 PM. Reason: added more info

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