1966 Chevrolet Caprice Ring and Pinion Set GM 12 Bolt Passenger Car - Thin Ring and Pinion Set - 3.73 Ratio - Fits 4 series 4.10 & Up Carrier - Rear guaranteed to replace your current 1966 Chevrolet Caprice Ring and Pinion Set GM 12 Bolt Passenger Car - Thin Ring and Pinion Set - 3.73 Ratio - Fits 4 series 4.10 & Up Carrier - Rear. 1966 Chevrolet Caprice Ring and Pinion Set comes new OEM 1966 Chevrolet Caprice Ring and Pinion Set aftermarket new 1966 Chevrolet Caprice Ring and Pinion Set of remanufactured 1966 Chevrolet Caprice Ring and Pinion Set GM 12 Bolt Passenger Car - Thin Ring and Pinion Set - 3.73 Ratio - Fits 4 series 4.10 & Up Carrier - Rear.