I have had it in 4wd but I dont normally back up. Today I did and it felt like it was surging or maybe Binding is a better word. I was in 4wh and half way to right lock. Is this normal anybody else have this problem. I have had the truck about a month and it has 26,000 miles on it. I have put about 6,000 on it and it seems to be a good truck.