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2015 Ford Mustang GT Differential Parts

Ford Mustang 8.8 Differential Parts


The Ring and Pinion has been redesigned for the 2015 Mustang 8.8″ IRS center section. West Coast Differentials carries these new “Super 8.8” gear sets, as well as a Differential Installation Kit and two different Limited-Slip differentials for the 2015 model year. Ford racing is first to market with a selection of parts for the Mustang enthusiast, and West Coast Differentials has got you covered!

2015 Ford Mustang Ring & Pinion

2015 Mustang GT 8.8″ IRS Ring & Pinion Gear Sets

  • Fits 2015-2016 Mustang  Super 8.8-inch IRS center section
  • Requires M-4210-B3 Mustang 8.8-inch ring-gear and pinion install kit
  • Made in United States in Ford’s Sterling Axle Plant
  • OEM Quality – our superior surface finish, hardening and manufacturing consistency provide the strongest and quietest gears in the market.
  • Requires aftermarket calibration if vehicle is not originally equipped with this gear ratio

Available now in 3.55 and 3.73 ratio

2015 Mustang Differential Installation Kit

2015 Mustang 8.8″ IRS Ring & Pinion Install Kit

Fits all Super 8.8″ IRS axles in 2015-2016 Mustang (Note: does not fit earlier 1986-2014 8.8″ axles)

  • OEM pinion bearings and races
  • OEM Differential bearings and races
  • Pinion and Differential Shims
  • Crush sleeve
  • Pinion nut & seal
  • Ring gear bolts
  • Gear-marking compound
2015 Mustang GT Torsen Differential Limited Slip Posi

2015-2016 Mustang GT Torsen® Differential

  • Fits 2015-2016 Mustang GT, V6 and I4 with 3.31, 3.55, 3.73, and 4.09 ratio gears only
  • Standard on 2015-2016 Mustang GT Performance Pack
  • Fits 34-spline axles
  • Torsen(R) T2R type differential
  • Features full-time torque-sensing,torque-biasing
2015-2016 Mustang 8.8 Trac-Lok Differential Posi Limited-Slip

2015-2016 Mustang 8.8″ Traction-Lok Differential

  • Fits 2015-2016 Mustang GT, V6 and I4 with 3.31, 3.55, 3.73, and 4.09 ratio gears only
  • Traction-Lok 8.8-inch differential
  • Fits 34-spline axles
  • Requires 4-ounces of CM-19546-A1 friction modifier with initial fill
  • For use with M-4209-88355A and M-4209-88373 Super 8.8″ Gear Sets

Order Parts

Our Differential Parts Experts are ready to take your call Monday thru Friday from 8AM to 5PM.

(800) 510-0950

Most orders received before 4PM Pacific Standard Time will be shipped out the SAME DAY, with next day delivery via ground service to most of the West Coast!
We do not offer Online Ordering We want to make sure you get the right parts... Simply give us a call! Let our parts specialists take the guesswork out of your order.

2015 Product Catalog

West Coast Differentials Ring Pinion Axles Rearend Parts Click the thumbnail above to view or download our current catalog. Download a PDF copy and save it on your computer for offline viewing or see the Flipbook version online.

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