A arm steering as on the Dakota(and pretty much everything else) is purposely engineered to change tow on compression. This is to lessen the effect of pulling the steering wheel out of your hands when one wheel hits an abnormality in the road surface. This is done by placing the steering arcs in offset plain of the a arm pivots. The more extreme the bump(change from factory ride height) the more the toe change. You can change the rack height, the spindle arm height, or both to lessen or eliminate the intentional toe change.