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" Under load / uphill " vibration

Discussion in 'Technical Chat' started by OZ-T, Jul 15, 2013.

  1. Jul 15, 2013 at 5:45 PM
    #1
    OZ-T

    OZ-T [OP] You are going backwards

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    I have been experiencing a vibration since new that occurs at varying speeds but only when the vehicle is under a slight load , usually climbing a slight uphill portion of smooth pavement .

    I only noticed it at around 40-44 mph locally , but I was on a road trip and it occured again , fairly severely at 65-70 mph over the weekend

    The vibration seems to come from behind / under my seat , the steering wheel does not shake side to side during the vibration , but the head rests on the front seats can be felt to move forward / backward .

    I originally thought CB carrier wobbling but I set up a GoPro to film it and it does not appear to move oddly .

    This has occured through many changes in my truck from stock / stock wheels + tires to lifted and larger tires

    The common denominator seems to be the slight uphill load on the truck .

    Is there any component that would vibrate in these conditions ?

    FWIW , my driveshaft has been replaced under warranty for signs of cracking near the union at the CB .

    Tires have been road force balanced , OEM Sport alloy wheels have been replaced for another warranty issue ( bubbling )

    Any thoughts ?

    Thanks in advance .
     
    Last edited: Jul 15, 2013
  2. Jul 15, 2013 at 5:53 PM
    #2
    Large

    Large Red

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    Noob search, geez..



    Actually I would torque your u-bolts, also there is a transmission mount TSB that I would look in to.
     
  3. Jul 15, 2013 at 5:58 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    FlimFlubberJAM
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    This ^^^^

    Aim the camera at the tail shaft output of the tranny, and see if you can reproduce the issue.
     
  4. Jul 15, 2013 at 5:59 PM
    #4
    OZ-T

    OZ-T [OP] You are going backwards

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    I already read all the vibration threads

    and my U bolts are torqued to 85 ftlbs
     
  5. Jul 15, 2013 at 6:00 PM
    #5
    OZ-T

    OZ-T [OP] You are going backwards

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    K

    I did look for cracks in the transmission isolators and found none
     
  6. Jul 15, 2013 at 6:02 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I don't think cracks are the issue, but rather too soft of a mount.
     
  7. Jul 15, 2013 at 6:04 PM
    #7
    OZ-T

    OZ-T [OP] You are going backwards

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    K , I'll rig up the GoPro and check it out
     
  8. Jul 16, 2013 at 8:16 AM
    #8
    SpacemanSpiff

    SpacemanSpiff Well-Known Member

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  9. Jul 16, 2013 at 9:12 AM
    #9
    OZ-T

    OZ-T [OP] You are going backwards

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    Any other input ?

    Won't get around to rigging up the GoPro till at least tomorrow
     
  10. Jul 16, 2013 at 9:14 AM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    One step at a time. That's the most probable cause given the description you gave. Get off your ass, and mount the camera for verification.
     
  11. Jul 16, 2013 at 12:48 PM
    #11
    OZ-T

    OZ-T [OP] You are going backwards

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    Hey Captain Butthole , I wasn't doubting you , I have to work today and part of tomorrow
     
  12. Jul 16, 2013 at 12:51 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    You don't work 25 hours a day. Im sure you have 30 mins. to beat your junk, so instead of working your wrist, install the camera so we can help you.
     
  13. Jul 16, 2013 at 1:25 PM
    #13
    OZ-T

    OZ-T [OP] You are going backwards

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    Tomorrow is camera day
     
  14. Jul 18, 2013 at 5:55 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    It is now, the day after tomorrow. We still ahve no video, or update from our OZ-T.
     
  15. Jul 18, 2013 at 5:59 PM
    #15
    Boone

    Boone Vaginas are rad.

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    Maybe he's busy installing his front BUMBER. Vid's can wait.
     
  16. Jul 18, 2013 at 6:20 PM
    #16
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    I would second (or third) the rear engine mount (that's what Toyota calls it even though it's not connected to the engine directly). Only other thing I would check is u-joints while you're under the truck.
     
  17. Jul 18, 2013 at 7:01 PM
    #17
    OZ-T

    OZ-T [OP] You are going backwards

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    Yeah sorry boys , got busy , didn't even drive the truck at all today

    Hopefully tomorrow
     
  18. Jul 18, 2013 at 7:02 PM
    #18
    OZ-T

    OZ-T [OP] You are going backwards

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    My U jounts are all new from having my driveshaft replaced 6 months or so ago
     
  19. Jul 18, 2013 at 7:06 PM
    #19
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Doesn't matter how old they are, if they are not torqued correctly. Check Da Torques.
     
  20. Jul 18, 2013 at 7:09 PM
    #20
    OZ-T

    OZ-T [OP] You are going backwards

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    Sure

    My vibe has been there since day one though , so unless these ones and the old ones are the problem , I'm leaning towards it being something else
     

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