Go get an angle finder and place it on the steering arm. That will yield the most accurate caster measurement. My truck leans when I turn too, I have no swaybar and the draglink is leaning the truck left or right depending on which way I turn the wheel; it's just that way. You also hear the box strain because you're turning the tires with massive amounts of friction between the tires and parking surface. Roll when you turn and it sounds much mo' betta.