The big problem is that 4 wheel drive gives a false sense of traction. When you take off you feel the slickness that you do with two wheel drive -- either front or rear. So you tend to think you have been traction than you do. Over the years I have been in the ditch twice with 4 wheel and both times I thought I was being very careful. My current vehicle has an anti-skid package -- that is great and it works. I would recommend it for everyone.