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" Under load / uphill " vibration

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

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  1. Jul 22, 2013 at 6:54 PM
    #41
    OZ-T

    #41
    OZ-T [OP] You chose ... poorly

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    Done , and wouldn't explain that it's been there all along
     
    OZ-T, Jul 22, 2013
    #41
  2. Jul 22, 2013 at 6:54 PM
    #42
    OZ-T

    #42
    OZ-T [OP] You chose ... poorly

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    Yes , doesn't change it

    Tried that already
     
    OZ-T, Jul 22, 2013
    #42
  3. Jul 22, 2013 at 6:55 PM
    #43
    blakes09

    #43
    blakes09 Toyota Tech..when im not Fishing

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    does weight in the bed change it?
     
    blakes09, Jul 22, 2013
    #43
  4. Jul 22, 2013 at 6:57 PM
    #44
    OZ-T

    #44
    OZ-T [OP] You chose ... poorly

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    That is tough to answer , I would lean towards no because it occured before I added my cap and tools however it occured recently fairly severely on a road trip without my tools onboard ( 250lbs ish )

    In that case though , it could just be speed related as I am never at highway speeds locally
     
    OZ-T, Jul 22, 2013
    #44
  5. Jul 22, 2013 at 7:00 PM
    #45
    totmacher

    #45
    totmacher Well-Known Member

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    lifted, removed, relocated, and/or painted some stuff

    Let us know what you find out on the dry metallic rattle. I've had that for years now. Only happens at certain combinations of rpm+speed+loading.
     
    totmacher, Jul 22, 2013
    #45
  6. Jul 22, 2013 at 7:01 PM
    #46
    OZ-T

    #46
    OZ-T [OP] You chose ... poorly

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    Will do
     
    OZ-T, Jul 22, 2013
    #46
  7. Jul 22, 2013 at 7:03 PM
    #47
    blakes09

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    blakes09 Toyota Tech..when im not Fishing

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    you ever checked your pinion angle?
     
    blakes09, Jul 22, 2013
    #47
  8. Jul 22, 2013 at 7:04 PM
    #48
    travel_taco

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    travel_taco Gentlemans Sausage

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    x2, I thought it was the exhaust system rattling around but it didnt concern me too much
     
    travel_taco, Jul 22, 2013
    #48
  9. Jul 22, 2013 at 7:15 PM
    #49
    OZ-T

    #49
    OZ-T [OP] You chose ... poorly

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    Yes , I've done all that
     
    OZ-T, Jul 22, 2013
    #49
  10. Jul 22, 2013 at 7:17 PM
    #50
    OZ-T

    #50
    OZ-T [OP] You chose ... poorly

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    With the mic right under the engine , it kinda sounds cyclic like something is turning and there is no lubrication
     
    OZ-T, Jul 22, 2013
    #50
  11. Jul 22, 2013 at 7:17 PM
    #51
    LocoTaco

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    LocoTaco Well-Known Member

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    LocoTaco, Jul 22, 2013
    #51
  12. Jul 22, 2013 at 7:27 PM
    #52
    UrPebkac

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    UrPebkac Well-Known Member

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    I can't say I have this vibe or at least I don't notice it. I know little about the toyota 8.4" rear end so I pose this theory for those who know to set me right.

    Thinking about your situations when it occurs you stated in is under a slight load and or climbing a hill. Any chance there is any type of slop in the rear end gears? or at certain speeds and angles that maybe the gears are not receiving proper fluid redistribution which is creating more friction inside the rear end? Only thing wrong with this theory is when you lifted and no change, or adding weight like you have stated. :notsure:
     
    UrPebkac, Jul 22, 2013
    #52
  13. Jul 22, 2013 at 7:29 PM
    #53
    OZ-T

    #53
    OZ-T [OP] You chose ... poorly

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    I'm wondering if it's a bent axle but I would feel that at all speeds
     
    OZ-T, Jul 22, 2013
    #53
  14. Jul 22, 2013 at 7:33 PM
    #54
    UrPebkac

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    UrPebkac Well-Known Member

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    That doesn't make since unless you had a bent axle since day one or early on.
     
    UrPebkac, Jul 22, 2013
    #54
  15. Jul 22, 2013 at 7:34 PM
    #55
    travel_taco

    #55
    travel_taco Gentlemans Sausage

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    does it sound almost like loose change in the dryer?
     
    travel_taco, Jul 22, 2013
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  16. Jul 22, 2013 at 7:35 PM
    #56
    OZ-T

    #56
    OZ-T [OP] You chose ... poorly

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    exactly

    It has to be something since it was stock though , and the wheels , tires , tire sizes and suspension have all changed but the vibe remains
     
    OZ-T, Jul 22, 2013
    #56
  17. Jul 22, 2013 at 7:35 PM
    #57
    OZ-T

    #57
    OZ-T [OP] You chose ... poorly

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    Kinda , yes
     
    OZ-T, Jul 22, 2013
    #57
  18. Jul 22, 2013 at 7:39 PM
    #58
    travel_taco

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    travel_taco Gentlemans Sausage

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    hmm, then i'll just have to see what you find out with the video. I really only notice it when im going from 0-5mph.
     
    travel_taco, Jul 22, 2013
    #58
  19. Jul 22, 2013 at 7:56 PM
    #59
    UrPebkac

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    UrPebkac Well-Known Member

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    Do you remember how the truck was driven when breaking it in? maybe it is how your gears hardened and how a load effects them at certain speeds? :confused:
     
    UrPebkac, Jul 22, 2013
    #59
  20. Jul 22, 2013 at 7:59 PM
    #60
    blakes09

    #60
    blakes09 Toyota Tech..when im not Fishing

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    is this vibration getting worse with mileage?
     
    blakes09, Jul 22, 2013
    #60
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