Peterbilt 389 steering jerking right and left when the road is bumpy

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Garnotte, Oct 5, 2016.

  1. Garnotte

    Garnotte Bobtail Member

    22
    2
    Oct 5, 2014
    0
    What could cause that? I can feel every defect on the pavement, the steering wheel want to go left and right, I almost need my 2 hand to hold it. We got it in the alignement shop twice.

    The truck is a 389 short hood, glider, 2015. We got 4 like that, they all do the same thing. They got a leaf sprung suspension on the front axle.

    When the road is nice without any pothole everything is fine. My old inter with over 2 000 000 km steer better than that o_O
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    6,586
    Aug 26, 2014
    0
    Things I would normally relate to that are:
    1: Incorrect toe in.
    2: Bad king pins.
    3: Incorrect caster.
    4: Worn steer axle spring pins and bushings.
    5: Defective steering box.
     
    dustinbrock Thanks this.
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