4wd Question

I'm sure this has been asked 100 times, but when i put my truck into and out of 4wd, it makes a clunk? do they all do this? or should it be quiet?

I'm sure this has been asked 100 times, but when i put my truck into and out of 4wd, it makes a clunk? do they all do this? or should it be quiet? Most 4x4 will make some noise because of the diff locking or unlocking but may be wise to check your u-joints or axle shaft u-joints to make sure that is not the problem. Hope this helps