Clunk when disengageing 4 wheel drive

Hey Gang,

I got a 03 ZR2 last monday and while testing out the 4 wheel drive I noticed that it took a little longer then I thought it should to disengage. And whe it does it makes a fairly loud clunk. much much worse then my Jimmy did.
Its to the point that you can feel it through the whole truck.

Its going into the dealership monday to fix a couple minor problems and have a tow hitch installed.
Anyone have an idea what this noise could be ?

Thanks Guys and Gals

The most common cause is uneven tread depth on the tires. The difference doesn't even have to be noticeable to cause a bang.

The most common cause is uneven tread depth on the tires. The difference doesn't even have to be noticeable to cause a bang.

Learn something new everyday... I have always wonder why this sometimes happens, it makes sense, besides its time for new tires for me anyways..

What kind of transfer case has it got?
On any 4 wheel full lock transfer case.
When shifting a 4 wheel out of 4 wheel lock you need to stop and put in transmission in netural or back up a little to take off the strain.
MT

Maybe the Vacuum switch is stiff, causing a slow shift response. Let go of the gas, engage and wait 5 seconds before you apply gas, like wise when disengaging.

Maybe the Vacuum switch is stiff, causing a slow shift response. Let go of the gas, engage and wait 5 seconds before you apply gas, like wise when disengaging.

Most all of them are all electronic any more.
MT

Learn something new everyday... I have always wonder why this sometimes happens, it makes sense, besides its time for new tires for me anyways..

:) I think that you are the first person that has ever believed me without having to try it. Most people refuse to believe that the tires can cause it or think that their tires are okay. A simple test with a tread depth gauge can usually reveal it. Regularly rotating the tires can help prevent it.

Here's an amusing thread with a couple of guys that were hard to convince, but after they replaced their tires the problem was gone:
http://www.automotiveforums.com/vbulletin/showthread.php?t=441178&highlight=bang

:) I think that you are the first person that has ever believed me without having to try it. Most people refuse to believe that the tires can cause it or think that their tires are okay. A simple test with a tread depth gauge can usually reveal it. Regularly rotating the tires can help prevent it.

Here's an amusing thread with a couple of guys that were hard to convince, but after they replaced their tires the problem was gone:
http://www.automotiveforums.com/vbulletin/showthread.php?t=441178&highlight=bang

Oh, memories......