FREE 1 to 3-Day Delivery on Orders $119+ Details

Talk to a Mustang Sales Tech
1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$6,000 Giveaway! Enter Daily >

Find Limited Slip Differentials for your Mustang

Ford Performance IRS Loaded Differential Housing; 3.55 (15-25 Mustang GT, V6, Dark Horse)Find parts that fit my vehicle

Item 406490
Product Image
Ford Performance IRS Loaded Differential Housing; 3.55 (15-25 Mustang GT, V6, Dark Horse)
Verify parts fit and get product recommendations.
Mustang Sales Techs: Connect Now M-F 8:30A-11P, Sat-Sun 8:30A-9P
Call now 1-877-887-1105 Chat Now
$0.00
11 Reviews 8 Answers
Our Price

$1,189.99 each

to: 43215
Please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Save with Open Box

From $713.99

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
Add to Cart
Save for later
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

    Loading Indicator

    Frequently Bought Together

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features & Specs

      • Loaded Differential Housing for Independent Rear Suspension
      • Installed With a 3.55:1 Ratio Gear Set
      • Includes a Traction-Lok Differential
      • Solid Cast Iron Housing
      • Sturdy Aluminum Differential Cover
      • Black Oxide Finish
      • Direct Bolt-On Installation
      • Fits All 2015-2024 Ford Mustang GT, V6 Models

      Description

      Maximum Differential Performance. Take your Mustang to the next level with the Ford Performance 3.55 IRS Loaded Differential Housing. This fully loaded differential housing features components and a build quality that’s designed for maximum performance. Whether you’re working on a project Mustang for the track, or looking to upgrade your ’15 to ’19 daily driver into a weekend warrior, this differential housing is for you.

      Fully Loaded. The Ford Performance 3.55 IRS Loaded Differential Housing comes pre-installed with an 8.80-inch ring and pinion gear set. This ring and pinion gear has a 3.55:1 gear ratio and is engineered to be both strong and quiet. This diff housing also includes a Traction-Lok differential. This limited-slip differential is designed to distribute torque to each of the rear wheels concurrently for maximum grip.

      Solid Build Quality. The Ford Performance 3.55 IRS Loaded Differential Housing is manufactured from cast nodular iron for extreme durability. Its differential cover is crafted from high-grade aluminum for strength, minus the weight. Finally, this differential housing is finished in a black oxide coating that prevents corrosion, but still permits a custom paint job.

      Direct Bolt-On Installation. The Ford Performance 3.55 IRS Loaded Differential Housing is designed as a direct bolt-on assembly onto your factory differential location. This install will require special tools and advanced mechanical skills, as well as a few hours work. If you aren’t confident with your skills, or if you can’t spare the time, professional installation is recommended.

      Application. The Ford Performance 3.55 IRS Loaded Differential Housing fits all 2015-2024 Ford Mustang GT, Dark Horse V6 models.

      Application Notes. Your ECU will require re-calibration when installing this loaded diff housing.a pinion flange kit for it to work. This differential housing fits 34-spline axles.

      Technical Note. For 2015-2017 Mustangs, a pinion flange change may be necessary as this Differential Housing comes with a 93mm Bolt Circle and 110mm Driveshaft Pilot installation. For applications that require a 95mm Bolt Circle and 113mm Driveshaft Pilot, you will need to use Ford Pinion Flange, part# FR3Z-4851-B.

      Fitment:

      Details

      Ford Performance M-4001-88355B

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Loaded Differential Housing, 3.55-Gear Ratio
      4.8

      Customer Reviews (11)

      Questions & Answers (8)

      Post Your Question

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • Dark Horse - 24, 25
      • GT - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
      • Mach 1 - 21, 22, 23
      • V6 - 15, 16, 17

          Related Mustang Categories