1983 Ford Bronco Ring and Pinion Set 4WD - Ford 9 in. - Ring and Pinion Set - 4.86 Ratio - 9310 Pro Gear - Oversized 35 Spline Pinion - Rear guaranteed to replace your current 1983 Ford Bronco Ring and Pinion Set 4WD - Ford 9 in. - Ring and Pinion Set - 4.86 Ratio - 9310 Pro Gear - Oversized 35 Spline Pinion - Rear. 1983 Ford Bronco Ring and Pinion Set comes new OEM 1983 Ford Bronco Ring and Pinion Set aftermarket new 1983 Ford Bronco Ring and Pinion Set of remanufactured 1983 Ford Bronco Ring and Pinion Set 4WD - Ford 9 in. - Ring and Pinion Set - 4.86 Ratio - 9310 Pro Gear - Oversized 35 Spline Pinion - Rear.