1967 GMC Pick-up Truck Ring and Pinion Set C15/C1500 Pickup - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear guaranteed to replace your current 1967 GMC Pick-up Truck Ring and Pinion Set C15/C1500 Pickup - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear. 1967 GMC Pick-up Truck Ring and Pinion Set comes new OEM 1967 GMC Pick-up Truck Ring and Pinion Set aftermarket new 1967 GMC Pick-up Truck Ring and Pinion Set of remanufactured 1967 GMC Pick-up Truck Ring and Pinion Set C15/C1500 Pickup - GM 12 Bolt Truck - Ring and Pinion Set - 5.13 Ratio - Fits 4 series 3.73 & Up Carrier - Rear.