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Driveline noise

Discussion in 'Chevy Trucks' started by sechracer, Nov 10, 2009.

  1. sechracer

    sechracer Senior Member
    Messages: 478

    Ok guys, I got a question bout my truck. I recently replaced the driveshaft and Ujoints. Right before I did that, I started hearing this clunk/click sound comming from the back of the truck. Being that my driveshaft was shot I figured it was that. Guess not. I do not hear it in reverse, only in drive. I hear it on flat roads and even on hills if I am maintaining a steady speed (30 mph or so). There is a small amount of play in the rear end. But I doubt that would make a difference when going uphill.

    97 GMC 305 vortec with the 4l60e tranny
  2. gd8boltman

    gd8boltman Senior Member
    Messages: 324

    Clean fluid in rear diff?

    Rear diff.full of oil?
    Maybe a rear wheel bearing, rear pinion issue?
    Transfer case full of oil?
    Tire noise?
    Just throwing our some guesses.

    Good luck
  3. sechracer

    sechracer Senior Member
    Messages: 478

    Unfortuntly its not a tire noise. I just greased the daylights out of the tranny spline and greased the ujoints more. Still there. Have to check the rearend next.
  4. TJS

    TJS PlowSite.com Addict
    Messages: 1,326

    Heh, my 98 Tahoe(4x4) does the same noise. I was told it is the transfer case output shaft bearing making noise. I also replace the U-joints (rear) u-joints and the front driveshaft U-joints and the noise is still there. It has been making noise for a while now. I just made sure the transfer case is full. I might take it apart someday.