1976 Ford F Series Trucks Ring and Pinion Set F-100 - 4WD - Ford 9 in. - Ring and Pinion Set - 5.67 Ratio - 28 Spline Pinion - Rear guaranteed to replace your current 1976 Ford F Series Trucks Ring and Pinion Set F-100 - 4WD - Ford 9 in. - Ring and Pinion Set - 5.67 Ratio - 28 Spline Pinion - Rear. 1976 Ford F Series Trucks Ring and Pinion Set comes new OEM 1976 Ford F Series Trucks Ring and Pinion Set aftermarket new 1976 Ford F Series Trucks Ring and Pinion Set of remanufactured 1976 Ford F Series Trucks Ring and Pinion Set F-100 - 4WD - Ford 9 in. - Ring and Pinion Set - 5.67 Ratio - 28 Spline Pinion - Rear.