1988 Dodge Diplomat Ring and Pinion Set RWD - Chrysler 8.25 in./ C213 Rear - Ring and Pinion Set - 3.07 Ratio - Double Drilled - Rear guaranteed to replace your current 1988 Dodge Diplomat Ring and Pinion Set RWD - Chrysler 8.25 in./ C213 Rear - Ring and Pinion Set - 3.07 Ratio - Double Drilled - Rear. 1988 Dodge Diplomat Ring and Pinion Set comes new OEM 1988 Dodge Diplomat Ring and Pinion Set aftermarket new 1988 Dodge Diplomat Ring and Pinion Set of remanufactured 1988 Dodge Diplomat Ring and Pinion Set RWD - Chrysler 8.25 in./ C213 Rear - Ring and Pinion Set - 3.07 Ratio - Double Drilled - Rear.