Wavetrac Differential - Jeep WK SRT-8 Cherokee Rear 2005-10 Innovative:Patented Wavetrac design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.Superior Materials:9310 steel gears run in case-hardened billet or forged steel bodies. ARP fasteners used throughout.Maintenance Free:As supplied new,...