4Wheel Drive & Sport Utility Homepage

0407 4wd Superior02 Z

<b>2.</b>  The kit uses Superior's Evolution-series 33-spline axleshafts (right), replacing the stock 30-spline units (left). The Superior 'shafts are constructed from an induction-hardened alloy and feature cold-formed rolled splines, which are said to be as much as 40 percent stronger than cut splines.
Jeep TJ Dana 44 Axle Upgrade

2. The kit uses Superior's Evolution-series 33-spline axleshafts (right), replacing the stock 30-spline units (left). The Superior 'shafts are constructed from an induction-hardened alloy and feature cold-formed rolled splines, which are said to be as much as 40 percent stronger than cut splines.  View Related Article