When my truck is in 4 wheel drive, my front tire locks up while turning sharply. When I turn right the front right tire will bind and then lockup. Vice versa for the left. As long as I don't turn so sharp, all is fine. Any of this sound normal?
That's pretty normal if you are on dry surfaces. Your front tires are trying to pull you while you're rear tires are pushing you, and they will bind on dry surfaces. Not good on your 4 wheel drive system.