2015-17 Ford Mustang Ford Performance IRS Loaded Differential Housing - Torsen - 3.73 - S550 by Ford Performance

Mustang Ford Performance IRS Loaded Differential Housing - Torsen - 3.73 (15-17)

Details   |  Description
  • Ford Performance Mustang IRS Loaded Differential Housing - Torsen - 3.73 (15-17) M-4001-88373T
Mustang Ford Performance IRS Loaded Differential Housing - Torsen - 3.73 (15-17)

Upgrade your IRS differential with this Ford Performance 2015-2017 Mustang Torsen differential with 3.73 gears!

Item #M400188373T
MPN# M-4001-88373T

Your Price: $1,869.00

Market Price:$2,196.00
You Save 14.89 % ($327.00)

Ships from supplier by Monday, October 31

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  • Faster Acceleration
  • Pre-Loaded Gears
  • Ford Performance Quality
  • Made In USA


  • 3.73 Gears
  • Fits 34 Spline Axles
  • Full Time Torque-Sensing/Biasing
  • Iron Housing

What's in the Box

  • (1) IRS Differential

Made in the USA

Product Description

Ford Performance Loaded Differential
Easily swap out your factory differential for Ford Performance's 2015-2017 Mustang Torsen 3.73 differential! From the factory, Performance Pack Mustangs were equipped with a 3.73 Torsen differential that holds more power and increases acceleration over the standard differential. Now you can have the same differential to easily upgrade your 3.31 or 3.55 ratio rear end. Ford Performance pre-installs the 3.73 ratio gears into the Torsen differential so it's loaded and ready to install into your Independent Rear Suspension.

Torsen Differential
Ford Performance utilizes a Torsen T2R differential to maximize performance. This differential features full-time torque sensing and torque biasing. When your tires are experiencing uneven traction, the Torsen differential will send up to four times more torque to the tire with the most traction. This is great for use when driving through tight corners or autocrossing. This differential has an iron housing and will fit 34 spline axles.

Fitment Notes
-Custom calibration is required for speedometer and shift corrections.
-Great upgrade for Non-Performance Pack Mustangs with Manual Transmission
-Factory Equipment on Performance Pack Mustang GT.

-Fits 2015-2017 Mustang V6, EcoBoost, GT w/ Manual Transmission

Ford Performance Racing Parts - NO WARRANTY - Click Here

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

1996-2017 Speedometer Correction - Click Here

Product Reviews

Vehicle Applications

Ford Mustang - 2015 (15) - 2016 (16) - 2017 (17)

About This Brand

Ford Performance
Ford Performance - Mustang Ford Racing Parts
Ford Performance Parts is the leader in performance parts and accessories for Mustang and Ford Lightning.

LMR.com is proud to offer Ford Racing Performance Parts for your project. Ford Racing is dedicated to manufacturing the highest quality products offered in the industry. Choose from suspension, exhaust, wheels, and other performance parts at LatemodelRestoration.com. If you want the best for your Mustang or SVT Ligtning, look no further than Ford Performance Parts!

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