SHOP

All Mustang Parts
Free Shipping on qualifying orders over $99* Details

2015-26 Mustang Ford Performance 110mm IRS Pinion Flange Kit - 6R80/10R80 Transmission by Ford Performance


2015-26 Mustang Ford Performance 110mm IRS Pinion Flange Kit - 6R80/10R80 Transmission
2015-26 Mustang Ford Performance 110mm IRS Pinion Flange Kit - 6R80/10R80 Transmission
S550 & S650 Mustang Rear Differential Swap | 3.15 to 3.55

Restore your leaking IRS pinion flange with this direct replacement 2015-2026 Mustang IRS Pinion Flange from Ford Performance!

Item #M4851M8A
MPN# M-4851-M8A

Everyday Low Price: $74.99

Out of Stock
 This item is returnable. Details


× close
LMR showroom & will call pickup service will be closed beginning Monday 9/21/26 for renovations until further notice. Need help? Contact Us.

Made in the USA

 Benefits

  • Adapts Manual IRS Diff To Auto Driveshaft
  • Replaces Defective Seal
  • Easy Installation

 Features

  • OEM Style Replacement
  • Ford Performance Quality
  • New Crush Sleeve

 What's in the Box

  • (1) Pinion Drive Flange
  • (1) Pinion Seal
  • (1) Pinion Nut
  • (1) Crush Sleeve

Mustang 110mm IRS Pinion Flange Kit
Replace your Mustang's defective IRS pinion seal with this OEM style 2015-2026 Mustang 110mm IRS Pinion Seal Kit from Ford Performance! Allows installation of manual transmission IRS carrier in automatic transmission cars without having to purchase a new driveshaft. The factory flange can become worn, which causes leaks and possibly rear end and driveshaft vibrations. Ford Performance has a fix for that issue with this IRS pinion seal kit! Get your defective seal fixed today to keep the rear differential cooling properly and keep that dirty fluid off your garage floor!


Ford Performance Racing Parts "Packs" and Component Parts Limited Warranty - Click Here
Ford Performance Racing Parts - NO WARRANTY - Click Here
Ford Performance Racing Parts Crate Engine Limited Warranty - Click Here

  • Ford Mustang - 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Fitment Notice
  • Fits 2015-2017 Mustang w/ 6R80 Transmission
  • Fits 2018-2026 Mustang w/ 10R80 Transmission
  • Fits 2018-2026 Mustang w/ MT82 Transmission

S550 & S650 Mustang Rear Differential Swap | 3.15 to 3.55

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!


California Residents:
Prop 65 Warning SignWARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

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 Late Model Restoration. If you want the best for your Mustang or SVT Lightning, look no further than Ford Performance Parts!