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BAD CLUNK HELP!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by The85k5, May 25, 2001.

  1. The85k5

    The85k5 1/2 ton status

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    Okay well I have a 85 k5 stock...well a 4 in lift but when i'm at a dead stop and i get on the gas the whole thing shakes/clunks....but if i eaze up on the gas it wont to it...a couple of my buddies said it's probebly my hub because i didnt grease the bearings in it when i replaced some parts...could that be it?
     
  2. mpascino

    mpascino 1/2 ton status

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    Go around and check all your U-bolts on the axles, sometimes they have a habbit of lossening up. This makes the axle shift under the vechile. Maybe try poking your head out the window/door at a stop, hold the brake and give it a little gas. Check to see if the axle moves.
    Mike

    You call that dirty!?
     
  3. ftn96

    ftn96 1/2 ton status

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    That as well, as check all your motor mounts and tranny mount. When you get on the gas your motor wants to twist up out of the truck on the drivers side. If that mount is broke it will cause the shaking and vibration your talking about and the clunk would be it settling back in or hitting something on the way up. the tranny mount can casue this as well. the rubber inside the mount is probably worn out, letting the tranny shift up under heavier load IE getting on the gas, when it moves up this would change the angle of the U-Joints, causeing the vibs and the clunk, but would not do it if you ease on it.
    CHeck the tranny mount first and then the motor mounts.
    I'll bet you $10 to a donut that its one of the 2.

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
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  4. ftn96

    ftn96 1/2 ton status

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    You can check the mounts by holding on the brake and gassing it like he said above and seeing how much movement you have. You should have some, like a maybe 1/2 or less as the hard rubber will compress a little under load.
    the tranny mount you can tell for sure if its bad when you gas it with the brake on.

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     

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