I have found a few different threads on this but nothing that is a smoking gun for mine.
When I first got my YJ, I noticed that it would creak when turning the wheel hard to the right or left. At first, I suspected it was the tires being too big. It sounded like they were rubbing within the wheel well. I changed to stock tires figuring since it's a four banger, I could use the extra pull anyway. I still had the creaking issue.
Now that I have been driving it for a while, I have noticed that it only happens when the my speed is 5 mph or less. If I am turning left or right, it isn't an issue. If I try to drive around a cul-de-sac or pull into a parking spot, I have to do a lot of backing up before I can get it in. If I try to push it, the YJ jumps a little bit. It also sounds sometimes like there is something interferring, maybe some sort of rod that it restricting it. Also, it may not be speed related but just seems so as the turns would be tighter at the lower speed.
Not sure if this is related but I think the shocks are shot. If I am going down hill too fast the body bounces and I can hear the wheel scraping in the wheel well. Also if I hit the smallest of potholes, the YJ bounces a good bit. Not exactly ideal to have a 4 wheel drive jeep that can't handle simple potholes on the highway.