2022 Peterbilt steering shudder, Pete techs say this is normal

Discussion in 'Ask An Owner Operator' started by kay_ray, Jul 8, 2022.

  1. Allow Me.

    Allow Me. Trucker Forum STAFF Staff Member

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    9000 mi/week driving ? (185,000 divided by 5 mo) you be truckin' ! ! !
     
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  3. kay_ray

    kay_ray Medium Load Member

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    185k $
     
  4. blairandgretchen

    blairandgretchen Road Train Member

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    Tell him I said hi - he’s the only guy I’ll take a truck to.
     
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  5. Cat sdp

    Cat sdp . .

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    What front axle did you spec ?
     
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  6. Heavyd

    Heavyd Road Train Member

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    That is classic bump steer. Bumps in the road are being transmitted right up through the steering. The shake is obvious, only started immediately after hitting bumps and diminishes shortly after. Caster too low, or caster too high can cause this. Most trucks like the 4 - 5 degree range of caster. Some axle beams, such as Hendrickson, are a naturally "bouncy" axle. Prostars and earlier 9000's would have this all the time with those axles. The fix was a stiffer nylon kingpin bushing or thrust washer on one side to make the steering stiffer. Some tires are also just very bouncy if over inflated. Check your tire pressure to make sure they aren't too high and even try dropping 5 or 10 psi and testing it to see if that helps. One band-aid you can also have installed is a steering stabilizer shock, the type that mount between tie rod bar and axle horizontally to help cushion and absorb these inputs.
     
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  7. KrumpledTed

    KrumpledTed Light Load Member

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    On the other hand, his own post said build quality of new trucks has gone to #### so…
     
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  8. larry2903

    larry2903 Heavy Load Member

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    Maybe early shock failure on the steer axle. I just recently put Monroe Magnums all the way around my truck, bumps on roads I travel regularly don’t feel like bumps anymore. Steer axle ride is greatly improved. I had a little bit of the bump steer you have, not as bad but it’s completely gone now.
     
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  9. kay_ray

    kay_ray Medium Load Member

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    Wow thanks alot thats alot of good information . Can bump steer develope slowly with life of the truck . I didnt had this problem when i got the truck brand new but it developed slowly around 12 to 14k miles .
     
  10. Ffx95

    Ffx95 Road Train Member

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    Looks like just bump steer. The roads up here in the north east are terrible so all the trucks eventually develop worsening bump steer so we all just get used to it and hold the steering wheel with both hands on bumpy roads. I mean you could fix it by replacing steering components but it’ll come back a few months later especially if you keep going on terrible roads.
     
  11. kay_ray

    kay_ray Medium Load Member

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    I did the classis touch the shock test . They all are warm after ride . But i am going to replace them soon to magnums .
     
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