1964-1972 GM 8.875" 12 Bolt Car Rear Differential Ring and Pinion Gear Set

GM 8.875" Ring and Pinion Gear Set   Description Package Includes: (1) GM 8.875" 12 Bolt Car Ring and Pinion Gear Kit (Choose Ratio Above) - *Note: The GM 8.875" 12 Bolt Car differential has carrier breaks at 2.73 / 3.07-3.90 / 4.10. That means if you have 3.42 gears from the factory, and would like to run a 4.56 ratio, you will need to buy a thick gear, or a new carrier. Contact support if you need help figuring out what carrier you have. - If you added horsepower, or you just want better stock performance out of your GM 8.875" 12 Bolt Car Differential, our gear set will get the job done. If you need help deciding on a gear ratio, please give us a call and we can help based on your needs! - Rigid Axle's aftermarket ring and pinion gear sets are made from heat treated 8620 steel. Our aftermarket gear set is made using a five-cut, face milled manufacturing process. Once set up correctly, this will give a square contact pattern on the drive and coast side of each tooth. We a