In all the units the upper A arm positioning never gets addressed The stock upper a-arm mounts have a drastic angle front to rear this causes the caster to change rapidly as the suspension travels up & down. That let's the spindle go all over the place. When corrected the entire suspension moves in much more smoothly and in unison and eliminates bump steer. My Duster uses all factory parts and when on ground or hanging in the air has the same front end settings., My car has stick A arms and caster at 7
