Transmission issue DT12

Discussion in 'Freightliner Forum' started by cernim, Feb 20, 2020.

  1. cernim

    cernim Bobtail Member

    6
    1
    Apr 15, 2019
    Kitchener, ON, Canada
    0
    Hey guys
    From time to time when I’m trying to put the transmission into drive or reverse nothing happens and it just beeps at me
    It only happens when the weather is cold… And if the truck sits for 10 or 15 hours
    Sometimes when I’m in reverse and try to put the truck into neutral, once I turn the shifter selector button to neutral it stays in reverse and check engine light comes on
    The code is SPN 525 FMI 7
    It goes away by itself in 3 to 5 seconds and then it shifts into neutral

    any ideas?
     

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  2. Vegas unlimited

    Vegas unlimited Bobtail Member

    37
    40
    Feb 18, 2020
    0
    You may need new swotch assembly..
     
  3. NorCenArk

    NorCenArk Light Load Member

    59
    24
    Mar 31, 2011
    Russellville, AR
    0
    If your truck is a 2014 - 2016, it will probably need a split pin bushing. That was a problem with early DT12.
     
    BUMBACLADWAR Thanks this.
  4. BUMBACLADWAR

    BUMBACLADWAR Road Train Member

    1,744
    1,624
    Dec 5, 2013
    0
    Theres some kind of "required maintenance" on these auto shifts,sometimes involving removing shifter case and adjusting crap. If I recall some cheaply made parts in there get broken easy. Fluids probably too thick at first. JMO
     
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