2001 Ford F Series Trucks Ring and Pinion Set F-350 Super Duty - 4WD - Dana 60 - Reverse Rotation - 4.88 Ratio - Thin - Fits 4.56 Case - Front guaranteed to replace your current 2001 Ford F Series Trucks Ring and Pinion Set F-350 Super Duty - 4WD - Dana 60 - Reverse Rotation - 4.88 Ratio - Thin - Fits 4.56 Case - Front. 2001 Ford F Series Trucks Ring and Pinion Set comes new OEM 2001 Ford F Series Trucks Ring and Pinion Set aftermarket new 2001 Ford F Series Trucks Ring and Pinion Set of remanufactured 2001 Ford F Series Trucks Ring and Pinion Set F-350 Super Duty - 4WD - Dana 60 - Reverse Rotation - 4.88 Ratio - Thin - Fits 4.56 Case - Front.