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Rumbling Noise

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by frank8808, Jun 3, 2003.

  1. frank8808

    frank8808 Registered Member

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    I have a 91 Blazer with 33's 2 1/2" lift and a cat back exhaust. When I'm driving and thing are warmed up I get a rumbling noise from the drive train. Mostly when I decelerate the gas and going down hill. /forums/images/graemlins/k5.gif /forums/images/graemlins/k5.gif I check the rear end everything looks fine also checked u-joint on play.I'm stumped.
     
  2. Confedneck

    Confedneck 3/4 ton status

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    rumbling noise? sound like air? or more like a vibration?
     
  3. TopOff

    TopOff 1/2 ton status

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    I have the same problem. I found my driveshaft slip-yoke wore through some of the plastic /forums/images/graemlins/angryfire.gif splines.
    I tried changing the U-joints with no help.

    When I took the slip yoke apart, I greased it heavely and the vibe went away for ~50 miles.

    Good luck.
     
  4. frank8808

    frank8808 Registered Member

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    Well your not going to beleive it. I took it into trans shop.They said it's not the drive line or the u joints
    and he said the trans was fine. I't might be the diff. So
    I took it to 4 wheel parts where I bought the gears. They fixed the problem. It was one bad u joint. /forums/images/graemlins/cool.gif
     

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