Originally Posted by ala_xfire

I don't think it is the sway bar, it is just the way the geometry of the rear suspension works.
The lower you go, the farther forward you go, the sway bar could not force the wheel forward if the geometry did not allow it.
As the front locator link moves down, it describes an arc with the lower point farther forward than the normal resting high point.
(I'm sure there is an arc tangent formula for it, but I ain't going there