1986 Chevrolet Monte Carlo Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 3.73 Ratio - Fits 3.23 & Up Carrier - Rear guaranteed to replace your current 1986 Chevrolet Monte Carlo Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 3.73 Ratio - Fits 3.23 & Up Carrier - Rear. 1986 Chevrolet Monte Carlo Ring and Pinion Set comes new OEM 1986 Chevrolet Monte Carlo Ring and Pinion Set aftermarket new 1986 Chevrolet Monte Carlo Ring and Pinion Set of remanufactured 1986 Chevrolet Monte Carlo Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 3.73 Ratio - Fits 3.23 & Up Carrier - Rear.