Re: Tranfer case or something else????
Was the oil from the diffs and T-case changed lately? If not, i would start here.
If the oil was changed, then the question is if you have Quadra Drive or not. With Quadra Drive some limited slip additive should be added to both diffs, otherwise some strange noise can be heard when making curves.
If T-case fluid was changed, was the right fluid used?
I would not suspect the T-case progressive coupler as the problem, because the progressive coupler in there should only transfer part of the torque to the front wheels when there is a difference in speed between the front and the aft drive shafts.