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Mustang Rear End Gears

Adding performance Mustang gears or Mustang ring and pinion gears to your rear end is a great way to increase acceleration & sometimes improve mileage.

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These Ford Performance & Yukon gear kits are offered in 3.08, 3.15, 3.27, 3.31, 3.55, 3.73, 4.10, and 4.30 for your 7.5" and 8.8" rear ends. Pick them up with a new rear differential gasket, ring & pinion gear install kit, gear oil, friction modifier, torsen differential, and everything else needed to complete your installation or diff restoration.
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Ford Mustang Rear End Gear Tech


  • Ring Gear: The Mustang ring gear bolts to the carrier and is driven by the pinion gear.
  • Pinion Gear: The Mustang pinion gear turns the pinion gear, transferring power from the driveline.
  • Shim: A shim is a thin piece of metal that is used to either adjust the fitment of other parts or take up a gap.
  • I.R.S.: This stands for “Independent Rear Suspension”, a housing which allows the left and right axles to move up and down separately from each other. 99-04 Mustang Cobras and S550 Mustangs are equipped with IRS systems.
  • Crush Sleeve: This is a collapsible spacer which installs on your Mustang's pinion and preloads the pinion bearings. Crush sleeves are not reusable and must be replaced if the pinion nut is loosened or removed.