1980 Chevrolet G10 Ring and Pinion Set RWD - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear guaranteed to replace your current 1980 Chevrolet G10 Ring and Pinion Set RWD - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear. 1980 Chevrolet G10 Ring and Pinion Set comes new OEM 1980 Chevrolet G10 Ring and Pinion Set aftermarket new 1980 Chevrolet G10 Ring and Pinion Set of remanufactured 1980 Chevrolet G10 Ring and Pinion Set RWD - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear.