Peterbilt / 6NZ Vibration

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jaysolomon, Sep 22, 2010.

  1. jaysolomon

    jaysolomon Light Load Member

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    noob here...

    2000 379 stock 475 6nz

    Simple Q.... Looking for Simple answer HAHA

    Going down the road i have a vibration in the floor board around gas pedal.

    let off and coast it goes away get back on it it comes back.

    trucks at cat now. No failed injector codes. injectors were replaced by cat in jan 2010.
    CAT IN-FRAME done 3 yrs ago (just out of warranty except injectors just put in jan 2010)
    any help would be greatly appreciated.

    TIA
     
  2. Krooser

    Krooser Road Train Member

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    Driveline vibration... look for bad u-jonts/tight u-joints, bad driveshaft support bearing, bent shaft, worn yoke....
     
  3. jaysolomon

    jaysolomon Light Load Member

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    Replaced all U-joints from front to back. Carrier bearing does not need it.

    My thinking is if it is drive-line then wouldn't it vibrate all the time even if i let off the pedal and coast?

    Thanks
     
  4. beltrans

    beltrans Medium Load Member

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    How about engine mounts?
     
  5. jaysolomon

    jaysolomon Light Load Member

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    call myself checking them out, but will check again in the morning. thanks
     
  6. country29

    country29 Medium Load Member

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    get your suspension ride height checked, petes were notorious for making all kinds of weird sounds/vibrations if the ride height was not correct.
     
  7. Krooser

    Krooser Road Train Member

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    Good point... but that applies to all trucks.
     
  8. jaysolomon

    jaysolomon Light Load Member

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    Thanks, will do
     
  9. heavyhaulerss

    heavyhaulerss Road Train Member

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    do you have balancers on steer's? if so, could be the balancers. was thinking if you have centramatics where there are steel balls in tube, this may cause slight vibration. just a thought.
     
  10. SHOWNUFF

    SHOWNUFF Bobtail Member

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    How do you know if your carrier bearing is bad?