Shifting

Discussion in 'Peterbilt Forum' started by BennyWest, Jun 8, 2019.

  1. BennyWest

    BennyWest Bobtail Member

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    Jun 8, 2019
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    My 387 gets stuck between the take off gear and 1st gear after I stop.it won't drop past 1st in order to take off. The shift arrow flashes. Anyone have any idea on what could be the problem. Just put a brand new isx in it only has 10000 miles on it. When running no slip or anything
     
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  3. Intothesunset

    Intothesunset Road Train Member

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    Sounds like a programming issue. Or a communication error to one of the many PCU modules in modern trucks.
    But just a guess.
     
    Puppage Thanks this.
  4. Blu_Ogre

    Blu_Ogre Road Train Member

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    A common issue is the "XY shift plate" basically the thing that changes the gears.

    May need adjusting or replacement.
     
  5. Dparkersr

    Dparkersr Bobtail Member

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    Jun 15, 2019
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    Did you get your problem fixed?
     
  6. mitchtazz

    mitchtazz Road Train Member

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    Check the air filter on the transmissions air regulator.
     
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