A Superior Jeep TJ Dana 44 Axle Kit 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.
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