1997 Pontiac Firebird Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.56 Ratio - Fits 3.23 & Up Carrier - Rear guaranteed to replace your current 1997 Pontiac Firebird Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.56 Ratio - Fits 3.23 & Up Carrier - Rear. 1997 Pontiac Firebird Ring and Pinion Set comes new OEM 1997 Pontiac Firebird Ring and Pinion Set aftermarket new 1997 Pontiac Firebird Ring and Pinion Set of remanufactured 1997 Pontiac Firebird Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.56 Ratio - Fits 3.23 & Up Carrier - Rear.