Ok, I'm pretty new to the forum, but I have been all over this thing trying to find out what may have happened today when I was in 4h. I was moving right along in 4h (we got 12 inches of snow) then I came to a stop at a light. When I started to move again, it seemed to pop out of 4h. I pulled the lever to put it back in 4h and the jeep wouldn't move. I was in first gear and my foot was completely off the clutch. It revved, and there weren't any weird noises...the tires just wouldn't move. I put it in to 2wd and I started moving again. When it poped out it did make some grinding noises, but i pulled it back into 4h and they stopped. Later down the road I put it back into 4h and it went just fine and everything worked. Not sure what happened. Is there anything I should check on? Im thinking my linkage may need some attention, but other than that what would make me go into "neutral" while in 1st gear?