I started hearing a slight clicking from my case last year. I didn't use 4wd till recently and the clicking is very loud. I have no free-play in either flange. Before it only did it in a turn so I suspected the birfields, but since it now does it in a straight line and nothing broke when I was goosin it in 4 low I kinda suspect the t-case. I've yet to pull the front driveline and run it, but weather permitting I'll do so this week. Lemme know what you think, Nate