i have been hearing a noise like a chatter which i thought was commin from the rear end but after listening mor carefully it it near the transfer case....also when i put it in drive or reverse from park it makes a CLUNK.....i tried to move the drive shaft but it is solid....my buddy told me that his truck did that before and his u joint was crack at the body so the everything seemed fine but the u joint was broke....has anyone had this happen