Lose throttle in higher gears

Discussion in 'Kenworth Forum' started by Paragon, Dec 26, 2021.

  1. Paragon

    Paragon Bobtail Member

    4
    0
    Dec 26, 2021
    0
    I have a similar problem with a 2013 Kenworth T800, I believe it is a ISX13 with a Eaton 13 speed.
    It has 323000KM on it.
    It was governed to 105km when I purchased it New, I had this removed at a Kenworth dealer.
    Now when I am in 7th High, I will lose throttle at around 90KM if I do not shift to 8 low before that.
    Then in 8 Low I will lose throttle around 100km if I do not shift to High before then.
    When I lose throttle the speed has to drop quite a bit before the throttle will respond again.
    I say around those speeds because if you are under power going up hill say, it will cut out at 95 and 105 km or so.
    If i was coasting or say going down hill it will cut the throttle the throttle out at 85 and 95 km or so.
    It acts to me as though the higher gears still have a limiter on them but there is not a top speed limiter.
     
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  3. bjytech

    bjytech Light Load Member

    139
    92
    Nov 9, 2013
    Ohio
    0
    Sound like the progressive shift settings (load based speed control / gear down protection) are enabled in the ECM, used for forcing drivers to upshift instead of running out the RPMs in lower gears.
     
  4. Paragon

    Paragon Bobtail Member

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    Dec 26, 2021
    0
    Thanks for the information!
     
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