Rear Differential Master Overhaul Kit (YK GM8.0) by Yukon Gear & Axle®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential components that deliver the ultimate in high strength and toughness. This high quality parts is designed to provide the gearing that helps ensure your engine stays in the powerband for faster acceleration while providing maximum safety during tough driving conditions.