1984 Oldsmobile Cutlass Supreme 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 1984 Oldsmobile Cutlass Supreme 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. 1984 Oldsmobile Cutlass Supreme Ring and Pinion Set comes new OEM 1984 Oldsmobile Cutlass Supreme Ring and Pinion Set aftermarket new 1984 Oldsmobile Cutlass Supreme Ring and Pinion Set of remanufactured 1984 Oldsmobile Cutlass Supreme 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.