today I finally found out why my 4wd wouldn't engage. I thought we had it fixed by replacing the GM hubs with Warn Supreme manual hubs. I was out on my hunting lease Sat, in the middle of 6,000 acres all by myself and got stuck, big time. I went through a shallow water hole that has a nice hard sand bottom but on the return run, when I started up the other side the rear wheels started to slip so I stopped and put it in 4wd and discovered it was broke. All I got again was a LOT of noise. I just knew it had to be the transfer case because it sounded like a chain dragging over stripped gears. To make a long story shout, we finally found out that the front drive shaft spline had stripped out. I had never heard of this happening. I'd have thought the 'U'-Joints would have snapped first. Is this something common?