This Auburn Gear 5420106 Grip-N-Loc Differential is for GM 8.875” 1964 through 1972 12 Bolt car rearends. It will accept Ring and Pinion gear ratios of 3.07:1 - 3.73:1. This differential also features included case material up to 50% stronger than OE cases as well as hardened steel gears. Auburn's exclusive technologies result in an even more robust differential to satisfy the extreme demands of serious drivers. If you push the limits of performance and traction through either competition or extreme weather driving, their Grip-N-Loc is your best choice. Auburn Gear 5420106 Grip-N-Loc GM 8.875” 12 Bolt Differential Features: Fits GM 1964 through 1972 12 bolt car rearends For Gear Ratios 3.07:1 - 3.73:1 Case material optimized for durability in extreme conditions Hardened steel gears minimize wear 2 Year Warranty (Best in the Industry!) Exclusive Cone and Cup design 30 Tooth Side Gear Spline Bearing Cone: LM603049 Bearing Cup: LM603012 For C-Clip axles Auburn Gear's Grip-N-Loc Limited Slip design ensures the high traction wheel can receive up to 4.5 to 5.5x as much torque as the low traction wheel. Their updated Cone clutch design provides an overall 25% increase in bias ratio. Their exclusive optimized gear geometry in the cone clutch assembly increases durability for confident high-performance driving.
