Why my truck jerks

Discussion in 'Ask An Owner Operator' started by Wajid8705, Aug 31, 2019.

  1. Wajid8705

    Wajid8705 Light Load Member

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    Jun 9, 2018
    North Carolina
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    It does not happen all the time but lifing foot off accelerator to slow down and then accelerating again the truck jerks.

    Anybody have any ideas to why it does that?

    Thanks in advance.
     
    stillwurkin Thanks this.
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  3. xsetra

    xsetra Road Train Member

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    Truck make and model.

    Is it a lag in time from pushing on pedal to actual acceleration?
    Could be your "go" pedal sensor is starting to fail.
    Clean the area under and around your pedal.
    Just a guess. Do you get any codes?
     
  4. boneebone

    boneebone Road Train Member

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    Check pedal position sensor or the accelerator pedal itself.
     
    Wajid8705 Thanks this.
  5. Wajid8705

    Wajid8705 Light Load Member

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    Jun 9, 2018
    North Carolina
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    2002 Freightliner Columbia with Detroit 60 Series 12.7

    No lag in time.. I mean when I say jerk this whole truck really shakes lifting foot on and off accelerator I noticed mostly in low gears.
     
  6. x1Heavy

    x1Heavy Road Train Member

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    You are taking off a huge amount of force from those low range gearing. There is a great deal of multiplication of the power in reduction from your engine turning many times to turn your wheel one time to stop the earth from moving and get your big heavy trailer moving.

    Take your foot away or clutch in shes gonna lean and jerk. The key is to be GENTLE.

    Now if you got the classic pound back and forth thats the 5th wheel being loose with the trailer. Adjust it at the shop.

    Sometimes when you ask a truck to move out in deep low shes gonna lean. Hold on to her and let her do what she needs to do until you are out of that spot.
     
    Dino soar, Wajid8705 and Iowa80 Thank this.
  7. AModelCat

    AModelCat Road Train Member

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    Check your driveline for excessive rotational play.
     
  8. FoolsErrand

    FoolsErrand Road Train Member

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    Bad slip splines, carrier bearing, egged out yokes, bad ujoints and bad front wheel bearings are my first concerns. I guess pinion backlash could be on the list of things to look at too but havent experienced it.
     
  9. Ezrider_48501

    Ezrider_48501 Road Train Member

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  10. Wajid8705

    Wajid8705 Light Load Member

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    Jun 9, 2018
    North Carolina
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    I will check into that, I believe that's what it is.
     
  11. Trucker61016

    Trucker61016 Medium Load Member

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    Linville, Va
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    Because youre dancing without panties on ??
     
    booley, stillwurkin and FlaSwampRat Thank this.
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