1984 Chevy K20 front driveshaft

Discussion in 'Transmission Forum' started by cw41, Mar 20, 2017 at 2:11 PM.

  1. cw41

    cw41 Hero Member

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    MAKE:Chev
    MODEL:Silverado K20 4x4
    YEAR:1984
    MILES:145000
    ENGINE:7.4
    DESCRIBE ISSUE....I'm trying to find the reason for my vibration at speeds of 55mph+. New Michelins and steel rims balanced/roadforced three times, rear driveshaft w/new spicer u-joints balanced, etc. Harmonic balancer appears fine and engine in smooth.
    Can/does the front driveshaft spin in 2H range that could cause the vibration very similar to a tire out of balance? The front driveshaft is original and has not been serviced other that grease. Very minimal play in the joints. I have the original auto hubs that require you to backup 10feet or so to make sure they unlock.
    thank you for your time to reply.
     
  2. bp042665

    bp042665 hunting nut

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    Easy way to check is to take front shaft out and then drive it
     
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  3. cw41

    cw41 Hero Member

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    thanks bp, I marked it and it dont move in 2wd. thanks
     

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