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Why the vibration when hubs are locked?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigk, Feb 7, 2002.

  1. bigk

    bigk 1/2 ton status

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    Location:
    Mendon Illinois
    My 87 K5 didn't vibrate when running down the highway with the hubs locked before I swapped in the 76 3/4 ton axles, but now it does. This is with the transfer case in 2wd. I usually only leave them locked when there's snow and ice. Any ideas? Thanks in advance.

    Karl
    Temporarily Unemployed Underwear Model
    87 3/4 ton
     
  2. jimmyjack

    jimmyjack 1/2 ton status

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    Did you replace the driveshaft at all? It could be the slip joint in the front drive shaft. As long as the hubs are locked the drive shaft will turn. Could be lots of stuff. Good luck.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  3. greg83k5

    greg83k5 1/2 ton status

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    bet your gears are lower in your sew set o' axle-age, and thus increased your driveline rotation speed, possibly amplifying an imbalance in the shaft, or slop from the cashed-out splines......


    my best guess,

    greg

    * keep the greasy side down *
     
  4. Overkill

    Overkill 1/2 ton status

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    You could try removing you front driveshaft and locking the hubs, to find out it it is you driveshaft. If you have the hubs locked and no driveshaft and still get vibration you know it's something inside the axle. If the vibes disappear when you remove the driveshaft you can be pretty sure the driveshaft is out of balance. May just need balancing. Hope this helps. Good luck.

    Jamie

    Pics at <a target="_blank" href=http://community.webshots.com/user/jlblmkh>http://community.webshots.com/user/jlblmkh</a>

    (Formerly heaj1)
    Swimmin like a rock, slingin like a stock, but not for long.
     

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