6. For the differential, we went with a Yukon Dura Grip Traction-Lok from Randy’s. This particular unit (PN YDGF9-31-AG) is a heavy-duty, 31-spline piece that uses a nodular case, billet side hat, and forged internals for greater strength than stock Traction-Loks. This particular model is an aggressive limited-slip that uses composite clutches for increased performance and long life. It’s rebuildable, retails for $460.85, and Yukon offers a one-year warranty against manufacturing defects. Here, Green has installed the ring gear and sets the unit in the case.