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  1. #1
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    Peterbilt / 6NZ Vibration

    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. #2
    Road Train Member Krooser's Avatar
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    Driveline vibration... look for bad u-jonts/tight u-joints, bad driveshaft support bearing, bent shaft, worn yoke....

  3. #3
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    Quote Originally Posted by Krooser View Post
    Driveline vibration... look for bad u-jonts/tight u-joints, bad driveshaft support bearing, bent shaft, worn yoke....
    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. #4
    Medium Load Member beltrans's Avatar
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    How about engine mounts?

  5. #5
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    Quote Originally Posted by beltrans View Post
    How about engine mounts?
    call myself checking them out, but will check again in the morning. thanks

  6. #6
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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. #7
    Road Train Member Krooser's Avatar
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    Quote Originally Posted by country29 View Post
    get your suspension ride height checked, petes were notorious for making all kinds of weird sounds/vibrations if the ride height was not correct.
    Good point... but that applies to all trucks.

  8. #8
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    Quote Originally Posted by country29 View Post
    get your suspension ride height checked, petes were notorious for making all kinds of weird sounds/vibrations if the ride height was not correct.
    Thanks, will do

  9. #9
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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. #10
    Bobtail Member
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    How do you know if your carrier bearing is bad?

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