1988 Chevrolet Caprice Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear guaranteed to replace your current 1988 Chevrolet Caprice Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear. 1988 Chevrolet Caprice Ring and Pinion Set comes new OEM 1988 Chevrolet Caprice Ring and Pinion Set aftermarket new 1988 Chevrolet Caprice Ring and Pinion Set of remanufactured 1988 Chevrolet Caprice Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear.