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Find Limited Slip Differentials for your Mustang

Ford Performance Traction-LOK Limited Slip IRS Differential; 34-Spline 8.8-Inch (15-25 Mustang, Excluding GT350 & GT500)Find parts that fit my vehicle

Item 388769
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Ford Performance Traction-LOK Limited Slip IRS Differential; 34-Spline 8.8-Inch (15-25 Mustang, Excluding GT350 & GT500)
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Review & Install - Ford Performance Traction-LOK Limited Slip IRS Differential; 34-Spline 8.8-Inch Video   See All Product Videos (1)
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118 Reviews 17 Answers
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$190.99 each

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    Frequently Bought Together

      Product Information

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

      Features & Specs

      • Put the Power to the Pavement
      • 8.8" IRS Limited Slip Differential
      • Factory OEM Replacement
      • Genuine Ford Racing Part M-4204-M
      • Requires 34 Spline Axles
      • Designed for Use with 3.31, 3.55 & 3.73 Super 8.8" Gear Sets
      • Fits 2015-2025 GT, EcoBoost and V6 Mustangs

      Description

      Limited Slip Differential. This Ford Racing 8.8" 34 Spline Traction-LOK Limited Slip Differential is a direct fit replacement for your IRS equipped S550 Mustang. A Limited Slip Differential (LSD) sometimes referred to as a "Posi" will allow both rear wheels to put the power down on the pavement giving you better traction and more impressive burnouts.

      Recommended Upgrade. This Ford Racing Traction LOK Limited Slip IRS Differential was specifically engineered for use with Ford Racing Super 8.8" IRS Gear and Pinion Sets, including 3.31, 3.55 and 3.73 gear ratios. Sold separately. Not for use with 3.15 gears.

      Application. This Ford Racing 8.8" Limited Slip Differential is the same original equipment that came standard on 2015-2025 GT, EcoBoost and V6 Mustangs. It is designed for use with independent rear suspensions (IRS) and requires the use of 34 spline axles.

      Technical Note. This Limited Slip Differential requires 4-ounces of CM-19546-A1 friction modifier with initial fill, it is recommended to use differential installation kit M4210B3.

      Fitment:

      Details

      Ford Performance M-4204-M

      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) IRS Limited Slip Differential

      4.9

      Customer Reviews (118)

      Questions & Answers (17)

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • Dark Horse - 24, 25
      • EcoBoost - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
      • GT - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 20, 21, 22
      • Mach 1 - 21, 22, 23
      • V6 - 15, 16, 17

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