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M-4001-88355B Mustang Super 8.8 in. IRS Loaded Differential Housing [3.55 Ratio]
InfoVehicle Info Needed
FORD PERFORMANCEPART NUMBER: 397-M-400188355B

M-4001-88355B Mustang Super 8.8 in. IRS Loaded Differential Housing [3.55 Ratio]

$1,18999
Truck Freight
3 left in stock
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Mustang
Mustang Super 8.8 in. IRS Loaded Differential Housing
  • Original Equipment on 2019 Mustang GT
  • Includes:
    • Cast Iron housing w/Aluminum Cover
    • Traction-Lok Differential M-4204-M
    • 3.55:1 Ratio Gear Set M-4209-88355A

      Ford Performance M-4001-88355B Mustang Super 8.8 in. IRS Loaded Differential Housing:

      • Original Equipment on 2019 Mustang GT
      • Fits Late Model Mustangs
      • Fits 2015-2017 Mustang
      • Iron housing with aluminum cover
      • Includes 3.55:1 ratio gear set M-4209-88355A and Traction-Lok differential M-4204-M

      Ford Performance M-4001-88355B Mustang Super 8.8 in. IRS Loaded Differential Housing Notes:

      • Custom calibration required for speedometer and shift corrections
      • 2015-2017 Mustang, pinion flange change may be necessary; comes with pinion flange with 93mm bolt circle and 110mm driveshaft pilot installed. For applications that require 95mm bolt circle and 113mm driveshaft pilot, use FR3Z-4851-B pinion flange
    • Ford 8.8 Differentials

      Ford Racing 8.8" Differentials give you a strong, reliable replacement for your factory unit. Choose from either Traction-Lok, Torsen Type, or Torsen T-2 to best fit your application and driving type. Traction-Lok. This clutch type can really plant the power to the ground through both wheels and is usually rebuildable. It is perfect for applications that are going to be used for straight-line street or street/strip use. While designed to allow smooth cornering without any ratcheting or coupling issues, it is not the most consistent controlling torque for through the corner acceleration.

      Show More

      Upgrade your rear-end setup with Ford Performance 8.8 Inch Differentials — a rugged, reliable upgrade for enthusiasts who demand improved traction, durability, and overall drivetrain performance. Whether you’re building a street cruiser, track car, or weekend warrior, these differentials deliver the strength and responsiveness needed to enhance acceleration and vehicle control in a range of driving conditions.

      The Ford Performance 8.8 differential platform is engineered from the ground up with heavy-duty components designed to outlast stock units. Precision-finished housings and high-quality internal gears help ensure smooth power delivery to both rear wheels, while robust bearings and seals reduce wear and extend service life — even under high torque or repeated load situations. This makes it an ideal choice for performance builds that see both daily driving and spirited use.

      One of the most popular options in this lineup is the 8.8 limited slip configuration, which improves traction by distributing torque intelligently between the two rear wheels. This enhanced traction translates to better grip during hard launches, corner exits, and slippery road conditions — giving drivers more confidence and improved performance off the line. The 8.8 limited slip differential also helps reduce wheel hop and uneven tire wear, making it a smart upgrade for both street and competition applications.

      Installation is straightforward for those familiar with rear-end work, and Ford Performance provides the engineering support and quality components you expect from factory-backed upgrades. Whether you’re refreshing a worn unit or building a high-power machine, these 8.8 Differentials boost rear-end strength, traction, and performance — helping you make the most of every horsepower and torque pound your vehicle produces.

    Part TypeDifferential Carrier
    Product LineFord Performance 8.8 Inch Differentials
    BrandFORD PERFORMANCE
    Package Height13.0
    Package Width17.0
    Package Length21.0
    Weight105.0 PG
    Part CategoryPerformance Parts
    Cover IncludedYes
    PositionRear
    Axle TypeFord 8.8 in.
    MaterialNodular Iron
    Part FitmentDirect Fit
    Grade TypePerformance
    Vendor Part NumberM-4001-88355B
    Package Qty1
    Package TypeEA
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    No Reviews

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