1991 Ford F Series Trucks Ring and Pinion Set F-250 - 4WD - Dana 60 Front - Reverse Rotation - Thick Ring and Pinion Set - 4.56 Ratio - Fits 3 Series Carrier 4.10& Down Carrier - Front guaranteed to replace your current 1991 Ford F Series Trucks Ring and Pinion Set F-250 - 4WD - Dana 60 Front - Reverse Rotation - Thick Ring and Pinion Set - 4.56 Ratio - Fits 3 Series Carrier 4.10& Down Carrier - Front. 1991 Ford F Series Trucks Ring and Pinion Set comes new OEM 1991 Ford F Series Trucks Ring and Pinion Set aftermarket new 1991 Ford F Series Trucks Ring and Pinion Set of remanufactured 1991 Ford F Series Trucks Ring and Pinion Set F-250 - 4WD - Dana 60 Front - Reverse Rotation - Thick Ring and Pinion Set - 4.56 Ratio - Fits 3 Series Carrier 4.10& Down Carrier - Front.