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Freightliner Columbia dropping gear when engine break is on

Discussion in 'Ask An Owner Operator' started by 2004Pete387, Sep 6, 2023.

  1. Sep 6, 2023 #1
    2004Pete387

    2004Pete387 Bobtail Member

    28
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    Oct 26, 2020
    0
    Hi there, i got a freightliner columbia '02, 13spd, lately has started to drop 13th and 12th spds when going downhill without using throttle pedal. Clutch and reman trans are 8mo old. Any suggestions are welcomed.
     
    2004Pete387, Sep 6, 2023
    2004Pete387, Sep 6, 2023
    #1
    Albertaflatbed Thanks this.
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  3. Sep 7, 2023 #2
    blairandgretchen

    blairandgretchen Road Train Member

    13,377
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    Dec 9, 2011
    South west Missouri
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    Explain‘drop’ 12th and 13th a bit better.

    Kicks out to neutral?
     
    blairandgretchen, Sep 7, 2023
    blairandgretchen, Sep 7, 2023
    #2
    Albertaflatbed, cke and singlescrewshaker Thank this.
  4. Sep 7, 2023 #3
    SmallPackage

    SmallPackage Road Train Member

    5,471
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    Dec 20, 2019
    Marion Texas
    0
    May be programmed to downshift a gear to get rpms up on the governor. Engine brakes work best at higher engine rpms. Old Cummins’ with Jakes always loved 2100 rpm. Very quick Slow down.

    Never heard of a Jake just throwing a trans into neutral tho. That will just stall the engine instantly.
     
    SmallPackage, Sep 7, 2023
    SmallPackage, Sep 7, 2023
    #3
    Albertaflatbed Thanks this.
  5. Sep 7, 2023 #4
    Big Road Skateboard

    Big Road Skateboard Road Train Member

    6,205
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    Is this a Top 2 trans?
     
    Big Road Skateboard, Sep 7, 2023
    Big Road Skateboard, Sep 7, 2023
    #4
    Albertaflatbed Thanks this.
  7. Sep 8, 2023 #5
    kay_ray

    kay_ray Medium Load Member

    486
    1,206
    Jun 6, 2019
    0
    Thats what automated transmission do . New steering wheel holder?
     
    kay_ray, Sep 8, 2023
    kay_ray, Sep 8, 2023
    #5
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