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Vibration Need Help

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by cajun72blazer, Nov 10, 2003.

  1. cajun72blazer

    cajun72blazer Registered Member

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    Once I get above 50mph the vibration starts. Vibrations is not only through the steering wheel, but the whole truck. If I let off the gas the vibration stops and the trucks is still moving over 50mph, but if I get back on the accelerator the vibration starts again. No problems under 50mph.

    Any ideas? Where to start?
    /forums/images/graemlins/1zhelp.gif
    Blake
    http://blakesara.home.comcast.net/K5Photos.htm
     
  2. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Any recent suspension changes....like a lift kit?

    I want to say driveshaft vibration, but it seems like the vibe should still exist under "coast" conditions??? /forums/images/graemlins/thinking.gif
     
  3. JIMs70K25

    JIMs70K25 1/2 ton status

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    Could be a couple things, driveshaft for one. Does it go away when you get above 50 say 65? I'd say tire balance. Could be a u-joint that's usually under acceleration and goes away when coasting. Checks these out and let us know.
     
  4. cajun72blazer

    cajun72blazer Registered Member

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    No suspension changes. I am going to have to check the vibration up at higher speeds and see if the vibration progresses. I will try the easy fix first and stop by a tire shop and have the tires balanced.
    I am was guessing the U-joints, because when coasting the vibration stops.
    I guess we will see tomorrow.

    Thanks,
    Blake
     
  5. Triaged

    Triaged 1/2 ton status

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    Did some punk kids lock your hubs or are they sticking?

    I like d-shaft as the best bet...other things will be fairly obvious on a lift a being real loose.
     
  6. cajun72blazer

    cajun72blazer Registered Member

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    Problem found - Bad u-joints on drive shaft.
    Thanks for your help.
     

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