1983 Ford F Series Trucks Ring and Pinion Set F-150 - 4WD - Ford 9 in. - Ring and Pinion Set - 3.00 Ratio - 28 Spline Pinion - Rear guaranteed to replace your current 1983 Ford F Series Trucks Ring and Pinion Set F-150 - 4WD - Ford 9 in. - Ring and Pinion Set - 3.00 Ratio - 28 Spline Pinion - Rear. 1983 Ford F Series Trucks Ring and Pinion Set comes new OEM 1983 Ford F Series Trucks Ring and Pinion Set aftermarket new 1983 Ford F Series Trucks Ring and Pinion Set of remanufactured 1983 Ford F Series Trucks Ring and Pinion Set F-150 - 4WD - Ford 9 in. - Ring and Pinion Set - 3.00 Ratio - 28 Spline Pinion - Rear.