Driveshaft/Train Noise

First let me apologize for my incomplete lack of knowledge in this realm, for it is my first rear/all wheel drive vehicle. (Good choice though eh ;Dy; )

Anyhow when idleing i get a good amount of "feedback" (noise) from under the vx. Doesnt sound broken or dangerous but it is noise that wasnt there before and i obviously would like it to go away.

Any input/advice is greatly appreciated and thanx in advance....x

Transfer cases do make a whine that varies with speed and age. Need more info to diagnose your issue. I’ve gotten the dealer to replace mine for sufficient whine.