Hey guys, today it snowed and we got around 6ins so I decided to go out and play in it with my '99 TJ. Not to long into it I decided to switch it into 4-Wheel drive after driving for a bit in it, it seemed to slip out of 4-wheel drive. When I went to go put it back into 4-wheel drive it was still in the 4-wheel drive position but the light wasn't on the dashboard and I could tell it wasn't in 4-wheel drive. I decided to try to put it into 2-wheel drive and as I tried doing this it made a very loud screeching noise and wouldn't lock into the 2-wheel drive slot. So I went to put it into Park, which also made a very loud screeching noise until I slammed into Park then it stopped. I also went a head a slammed the 4-wheel drive into 2-wheel which stopped the streaching and it locked in. Apon putting it into the 2WD position the 4-wheel drive light popped up, so I put it in Drive and it wouldn't go it acted like it was in Neutural. So I switched it back into the 4WD position and it started driving, but it was only in 2WD. My question is, what is going on? I personally have no idea. Maybe transmission? Transfer case?
This might have been really confusing and I'm sorry about that this is the best I know how to explain it. I could also use all the help I could get.