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Rear End Installation Kit; 8.8-Inch (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

Item 21203
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      Product Information

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


      • Complete Rebuild Kit
      • Essential on 60,000+ Mile 'Stangs
      • Ideal for Rebuilds or Gear Swaps
      • Includes All Seals & Hardware
      • Fits Ford 8.8" Rear End


      Install or Rebuild. Don't be caught without the seals or hardware you need when doing your gear swap or rebuild. An Install kit has everything to make installing new gears or rebuilding your 8.8" rear easy and painless.

      Extra Insurance. If you're installing new gears, an Install kit is extra insurance against future problems. Any Mustang can benefit from fresh hardware in the differential to ensure your gears perform flawlessly. However it is highly recommended to add this kit to your new gears for any Mustang with over 60,000 miles, since your differential's hardware is probably worn down and you can combine labor costs to save money.

      Complete Kit. This kit has all the components of the Installation Kit, including pinion seals, gaskets, hardware, marking compound and brush, and even Loctite. It is the same as the Bearing kit without bearings.

      Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

      Application. This Install Kit is designed for all 1979 to 2014 Mustangs with the 8.8" rear end.

      Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

      MPN# F8.8IK

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (36)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 36 customers

      • November 14, 2019

        5 1996 GT - 14mustangowner

        Everything you need

        Good little kit to get the rear end shimmed correctly. Had all different size shims and bearings

        Helpful (0)
      • September 29, 2019

        5 2007 GT - Bronco210

        no more leaks

        had to replace inside and outer seals. after 6 months still no leaks. great item.

        Helpful (0)
      • June 06, 2019

        5 2004 GT - DannyO


        Awesome !! Great packaging nothing was missing very glad on how everything was handled

        Helpful (0)
      • June 01, 2019

        4 2014 GT - BrockW

        Excellent product

        This product was very easy to use and seemed to be of great quality!

        Helpful (0)
      • May 10, 2019

        5 2005 GT - DanielO

        Great kit

        Comes complete with everything you need, except for the gears.

        Helpful (0)
      • September 19, 2018

        5 2003 GT - PaigeC


        Haven’t installed yet but definitely can’t wait! Good price

        Helpful (4)
      • April 01, 2018

        4 2012 V6 - JadenG

        It just works

        Nothing special. It just works. All the shims and everything I needed. Just. Works

        Helpful (5)
      • February 15, 2018

        5 2006 GT - ZachF

        Great kit

        Great kit for the price. Had all the little things that I needed to finish up my rear end.

        Helpful (7)
      • December 18, 2017

        5 2004 GT - WilliamC

        Fit well

        Product fit very well and was grateful I purchased saved a lot of headache!

        Helpful (6)
      • November 30, 2017

        2 2003 Mach 1 - Mach1Padilla

        Dont Get it

        Do not get this kit, the ring bolts back out over time even with loctite and proper torque down. if you do purchace this kit at the very least get ford performance ring gear bolts they have a bigger head for more surface area contact with the gear.

        Helpful (6)

      Questions & Answers (2 answers)

      2 Top Rated Questions

      Will this work for an 8.8 IRS from an explorer?

      i just bought this kit about a week ago to install my 4.10s in the next month, do i need the Ford Performance 8.8 in. Rear Axle Bearing Seal Kit? to finish my gear install or do i need another kit ? thanks

      • It is recommended that you purchase the Rear Gear Pinion Bearing - 8.8 in. kit to go along with your 4.10 gears.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      Hardware Included:

      • Pinion Seal
      • Carrier Shims
      • Crush Sleeve
      • Pinion Nut
      • Cover Gasket
      • Ring Gear Bolts
      • Brush
      • Gear Marking Compound
      • Loctite

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