Wake up your 1979-93 Mustang with a set of rear end gears. Our 3.55, 3.73, and 4.10 gear kits are a popular upgrade among Mustang owners. By choosing a higher gear ratio, you increase acceleration and performance. Choose the right Ford Racing or Yukon gears for your 7.5" or 8.8" at latemodelrestoration.com. Don't forget to add Royal Purple gear oil and friction modifier to your order to refill your differential after the gear install.