Shawn,

A track bar (diagonal link) is not the same as a traction bar. A track bar is installed from the front of one ladder bar (or 4-link) to the rear of the other one, forming a couple of triangles that prevent side-to-side motion of the rear axle. Go to this page http://www.chassisengineering.com/rearsuspension.html and look at the last photo at the bottom.