My '08 F350 (drw cc 4x4)is rock stable, just like my older '03 6.0 (drw cc 4x4). My F450 (cc 4x4 wide front axle) on the other hand is pretty squirley. driving it empty is like taking off in a Cesna 152 in a crosswind. Freaky as hell. It really doesn't drive well unless it's loaded.