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Clunking noise

Discussion in 'Truck & Equipment Repair' started by Sealer People, Nov 26, 2008.

  1. Sealer People

    Sealer People Senior Member
    Messages: 207

    Hello again,,

    My truck is a 1996 chevy diesel 2500 4x4. automatic.

    Im noticing when its in 4x4 only, a clunking noise when I change gears from drive to reverse & vise versa after I drive a foot or two. Someone told me this could be a U joint.

    I took it to the mechanic today, he didnt hear anything & said its more than likely fine or could be something with the drive train no engaging.

    He already changed a lower left side ball joint about a week ago.

    the best i could describe the clunk sound, is that its almost like when the emergency brake is on and you try driving a bit.

    Any ideas ??????
  2. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    i would check the u-joints on the front shaft
  3. Also have someone check your rear differential. When the rear diff is going it can make the same noise.

    Also be careful of transfer case and tranny fluids. If you run your transfer case with little or no fluid the gear teeth get hot and bend. Then when it engages it clunks.
  4. mikeauto1

    mikeauto1 Junior Member
    from nh
    Messages: 6


    sealer people

    the clunk is is most lickly the the slip joint the goes into the end of the tranny, the all go bad from your year to 2005. the part is available through gm and is fairly cheap
  5. terrapro

    terrapro PlowSite Veteran
    from MI
    Messages: 3,868

    change your u-joints
  6. dingybigfoot

    dingybigfoot Senior Member
    Messages: 250

    check ur joints on the front shaft. i had the same problem this past week.
  7. Turf Commando

    Turf Commando Senior Member
    Messages: 567

    I'm no mechanic, but like I told my friend the problem lies in the BOWTIE...:rolleyes:
    Clunking does sound like a U-joint issue..
  8. hydro_37

    hydro_37 PlowSite Veteran
    from iowa
    Messages: 3,790

    Jack up the rear of the truck and spin a back whel.Look for play in the u-joints and then do the same for the front. You will see and hear what is making the clunk. It could be the slip joint too.
  9. Crash935

    Crash935 2000 Club Member
    Messages: 2,377

    Does it only in 4x4,

    Check u joints in FRONT driveshaft.