This listing is for a clean Ford 9.75" 4.10 ratio ring and pinion. These parts were removed in perfect working condition and were replaced with 4.56 gears for improved performance. These parts will fit any Ford 9.75" rear axle found in all 1997-2016 Ford Expedition and F150 5.4L V8's. The 4.10 ratio will offer more horsepower and torque than the 3.55 & 3.73 ratio gears included in this axle from the factory. They can also make great inexpensive repair parts a reliable spare set for the heavy off-roader or chase truck. Don't miss out on genuine quality parts at this low price. Thanks for looking!