Spicer 10031771 Ring and Pinion, M300 Axle, Fits 2017 F-350 Super Duty (with Dual Rear Wheels) - 4.30 Gear Ratio - Rear Axle

All Spicer ring and pinion gears are designed and tested to meet original equipment specifications. When you purchase genuine Spicer ring and pinion gear sets, you can be confident the ring and pinion set will meet or exceed the exact Dana standards that original equipment manufacturers have relied upon for more than a hundred years.