I was driving around a ranch on the gulf coast this weekend and got caught up in some mud. I went full lockers and low range, and naturally made it out easily. It was a full throttle out of the mud and up the embankment, so I would describe it as a high torque situation. Nothing the LC can't handle, right? Well I shifted back into high and turned off my center differential lock, reversed, then attempted to move forward on a slight incline. Wasn't working, so I figured I was not all the way in hi, so I jacked with it, and began to move. At the top of the rpm range for 1st gear, instead of shifting, the t-case seems to have just gone out. The rpms redlined, just as they would have if I was in neutral. I stopped and the car would not move in either hi or low range. The engine would rev, and the car would remain stationary, in all configurations. When I would shift from drive to park sitting there trying to remedy the problem, there were awful clanking sounds going on. The transmission sound busted. When I looked under the car, only the front drive shaft was spinning when in drive. So I decided to lock the center differential, and the car moved. My conclusion was that something was going on in the t-case with the differential, so I opted to remove the front drive shaft and go with a locked center diff(my only option basically besides being towed). Well I made it back to Austin, 180 miles of high way driving just fine. Now I need to figure out what the hell is going on, so let me know what you think please. Thanks a lot for taking the time to read this.