Mine wanders a little in Glamis. It might be partly the Bighorn's fault. Here's how to check your rear toe in. Especially if it pulls to the side under power. I checked mine and it was off. I then used a pipe as a straight edge to see which side was off. Hold the straight edge against the side of the wheel, and then measure the gap between it and the body panel behind the front wheel. The pass side had I think 3/4" more gap then the drivers. I then put the tape measure between the inside of the rear tires to check toe. It had a 1/4 inch toe out. I set it at an 1/8inch or 1/4inch toe in, using the straight edge to keep it even side to side. It handles much better now.