1987 Chevrolet G30 Ring and Pinion Set RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 5.13 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear guaranteed to replace your current 1987 Chevrolet G30 Ring and Pinion Set RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 5.13 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear. 1987 Chevrolet G30 Ring and Pinion Set comes new OEM 1987 Chevrolet G30 Ring and Pinion Set aftermarket new 1987 Chevrolet G30 Ring and Pinion Set of remanufactured 1987 Chevrolet G30 Ring and Pinion Set RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 5.13 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear.