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I'm talkin about good vibrations... UPDATED

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by cp87jimmy, Feb 25, 2001.

  1. cp87jimmy

    cp87jimmy Registered Member

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    I\'m talkin about good vibrations... UPDATED

    Well not really, actually they're bad and getting worse. I've had my 4" shackle flip installed for some time now. Never had any problems with vibes so to speak. I lowered the t-case with the spacers already on the truck by reversing them. Now to my current problem. Today I started getting a terrible shudder at about 15 mph and up under load only. When I release the gas pedal the vibes go away. I suspect that the u-joint are possibly failing but they don't appear to be bad upon inspection. If they we're going bad would it start to shake like that? I plan on replacing them regardless but is there something else I should look for? Also any specific brands of joint to use?
    Thththankkkks aaa bbbbunchh...
    Chris

    GO STARS !!!!
    <A target="_blank" HREF=http://www.cp87jimmy.coloradok5.com>http://www.cp87jimmy.coloradok5.com</A><P ID="edit"><FONT SIZE=-1>Edited by cp87jimmy on 02/26/01 07:48 PM (server time).</FONT></P>
     
  2. Wheels

    Wheels 1/2 ton status

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    Re: I\'m talkin about good vibrations...

    One thing you may look at its the length of the drive shaft. The slip joint may be causing the vibration (not enough in to stabalize it). Mine had to be lengthened 1 3/4 inches after the 4 inch lift. I had the same vibration that got worse the longer I drove it. This also chewed up the u-joints (look at the ends, you'll see the needles polishing the end of the joint). Mark the slip joint with a scribe all the way around, where either the seal (slip output) or the dust seal (fixed yoke output) is, with the vehicle on the tires (normal run length). If its a slip output, disconnect the rear u-joint and slide it all the way in and mark it there. This will give the drive shaft shop some reference marks to figure how much to lengthen the shaft. Cost about $100 to get it lengthened and balanced. While your at it, go ahead and replace the u-joints.
     
  3. baldbandit

    baldbandit 1/2 ton status

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    Re: I\'m talkin about good vibrations...

    "Precision" is the best brand u-joint to use!

    baldbandit
     
  4. cp87jimmy

    cp87jimmy Registered Member

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    Re: I\'m talkin about good vibrations... UPDATED

    Well it ended up being u-joints after all. I guess that my inspection of the joints wasn't as good as it should've been. Man getting old sucks.
    Chris

    GO STARS !!!!
    <A target="_blank" HREF=http://www.cp87jimmy.coloradok5.com>http://www.cp87jimmy.coloradok5.com</A>
     

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