Richmond Gear 79-1389-1 Ring & Pinion FORD 10" 3.89 PRO GEAR 35SP

Precision Differential Ring and Pinion maintains correct power distribution to a Designed for compatibility with OEM-specified gear oil viscosities, ensuring correct lubrication under all operating conditions. Heat-treated alloy steel construction withstands peak torque demands of loaded commercial trucks, preventing gear tooth fatigue and breakage. OEM-spec gear ratios preserve intended vehicle speed, performance, and fuel economy characteristics. Precision fits to carrier housing bores eliminate shimming uncertainty and simplify installation for experienced drivetrain technicians. Precision-machined gears and tight backlash tolerances ensure smooth power transfer and efficient torque distribution between axles.