When I had the Auto Springs in mine and the 295/70/17 Nittos still on it, mine would actually change lanes when hitting certin bridge expansion joints on the highway between my home and the shop I drive to in Virginia. It got so bad that it was the final influence for me to lower my 4x4. I can not hit those same bridge joints at the same speeds or higher, and the truck sticks to the road like glue...SERIOUSLY !!!

 

The rear of my truck jumps sideways when I hit a speed bump... kinda annoying. My tires and rear flip kit dont help things wither.. I only have about 2" of suspension travel in the rear.. then the bump stops hit.. BOO!