4wd clunk

Discussion in 'Lifted & Offroad Suspension' started by bry2500, Feb 4, 2009.

  1. bry2500

    bry2500 Epic Member 5+ Years 1000 Posts

    Each time I drive in 4wd i hear a loud clunk, mostly during slow tight turning but also sometimes just when starting to move straight ahead.almost sounds like a u joint but super loud. I have checked every thin out and all seams tight and not worn. I know whata cv joint sounds like when it's going and this definitely is not a cv joint. I has almost a ping noise to it like if you were to push a dent out of sheet metal. Any thoughts?

    also it is mostly when driving in reverse and turning.
  2. GaryL

    GaryL Epic Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    4wd's don't like to turn tight when in 4wd, especially on dry pavement. A clunk in those situations is normal, but try to avoid them because it will damage the transfer case. The noise you hear when just starting out could be a little play in the transfer case. Someone else can probably help you some more.
  3. MrShorty

    MrShorty Epic Member 5+ Years 1000 Posts

    Sounds like the 4wd binding up and releasing. Normal in 4H/4L on a good traction surface, though it does indicate that something will likely break if you continue the practice. 4H/4L should only be used when traction is poor enough to allow the wheels to slip.

    I had a truck do something similar when I had mis matched tires (same size but different manufacturer). The size difference between manufacturers was enough to cause the drivetrain to bind up and release with a clunk.
  4. bry2500

    bry2500 Epic Member 5+ Years 1000 Posts

    I do have different manufacturer tires, they are the same size but the rear look a smidge smaller. I thought it was an optical illusion because of the front end rake on the avalanche. Looks like I have to find 4 new tires. Thanks for the quick replies guys.


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