2015-23 Mustang Ford 3.31 Gears by Ford

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Details   |   Reviews
2015-23 Mustang Ford 3.31 Gears

If it's time to rebuild your rear-end, be sure to pick up this OE 3.31 gear set for your 2015-2023 from LMR!

Item #LRS-4209-331
MPN# FR3Z4209D

Everyday Low Price: $344.99

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Made in the USA


  • Ford Quality
  • OE Replacement
  • Made in the USA!


  • Renewed Performance
  • Superior Quality
  • Includes Pinion Nut & Crush Sleeve

 What's in the Box

  • (1) 3.31 Pinion Gear
  • (1) 3.31 Ring Gear
  • (1) Crush Sleeve
  • (1) Pinion Nut
  • (1) Inner Pinion Bearing w/ Race
  • (1) Outer Pinion Bearing w/ Race
  • (1) Ring Gear Bolt Set
  • (1) Pinion Seal

3.31 Gears for 8.8" IRS
Rear end gears don't go out often, but when they do - they need to be replaced immediately. Late Model Restoration has you covered with this OEM 2015-2023 3.31 Gear Set to get your S550 running how it should be. Rear-end gears are essential to propelling your Mustang forward!

3.15 ratio differential is not compatible with 3.31, 3.55, 3.73, and 4.09 ratio gears. Use differential M-4204-M.

- Fits 2015-2023 Ford Mustangs

Speedometer Correction
After installation of rear gears, you will need to correct the speedometer. There are different methods to do this depending on year model.

1979-1995 Speedometer Correction - Click Here
1996-Present Speedometer Correction - Click Here

Ford Motorcraft Warranty - Click Here

  • Ford Mustang - 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023

California Residents:
Prop 65 Warning SignWARNING: Cancer and Reproductive Harm-

About This Brand

Ford Motor Company Genuine Parts, Motorcraft® Parts and Ford and Motorcraft Remanufactured Parts are all excellent choices when it comes to performance, longevity and value for your Mustang or SVT Lightning. And they’re all backed by a Ford Motor Company limited parts warranty*, so you know their parts you use are going to perform like they should. Put the same parts on your Lighting & Mustang that came from the factory!
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