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Ford Performance Ring & Pinion Installation Kit w/ High Torque Bearing - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

Item 50511
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      Product Information

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


      • 8.8" Gear Installation Kit
      • Ideal for Rebuilds or Gear Swaps
      • Essential for 60,000+ Mile Ponys
      • Compatible with Both IRS and Solid Rear Axles
      • Fits 1986-2014 V8 and 2011-2014 V6 - Excludes 2013-2014 Boss and GT500


      Perfect for Installs or Rebuilds. When installing new gears in your Pony it only makes sense to replace the old worn seals and bearings while the housing is apart, especially if it has over 60,000 miles on the odometer. A Ford Racing Ring and Pinion Installation Kit is extra insurance against the need for another costly tear down and rebuild.

      Complete Kit. This Ford Racing kit comes complete with all the components needed to swap out your ring and pinion gear. It includes pinion and carrier shims, crush sleeve, pinion seal, pinion nut, ring gear bolts, Shelby GT500 high-torque pinion bearing, heavy duty carrier bearings, cover gasket and all the required hardware.

      Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. This kit includes the required 2012 Shelby GT500 High-torque pinion bearing.

      This Ford Racing Ring and Pinion Installation Kit is designed for use with 8.8in rear axle equipped Mustangs, including the 1986-2014 V8 and 2011-2014 V6 models. Works with both Independent Rear Suspension (IRS) and solid rear axles.

      Technical Note: Does not fit the 2013 Boss or 2013-2014 Shelby GT500 Mustangs with axle codes S-215-D and S-219-D.

      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 Details

      MPN# M-4210-B2

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (73)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 73 customers

      Installation Time: Full Day

      Installation Cost: $250-$500

      • January 09, 2020

        5 2008 GT - Fbmustang2008 Installation Time: Afternoon

        OEM Fit

        Great product! OEM quality. Never installed one of these before, completed in an afternoon inside of garage. Put on 2008 Mustang GT/CS with over 250,000 miles on original diff. Used with the Ford Performance Traction-LOK Limited Slip Differential w/ Carbon Discs - 31 Spline 8.8 in. Had everything I needed, minus the gear oil (75w90, 3 qts) and friction modifier (1 small bottle). No improvement for performance, just no more "whine" every time I turn left or right

        Helpful (0)
      • January 05, 2020

        4 2007 GT - Jay Installation Time: Weekend

        Good Start

        Great quality but inadequate pinion shim options. Came with a bunch of the same thickness shims so it was difficult to get the correct pinion shim stack thickness, eventually had to settle on a less than ideal combination of shims which gave me good backlash (0.011") and a darn fine gear contact pattern, but still yielded gear whine at 70 and worse at 80 mph on the drive/float. As an ASE certified Master Mechanic, I recommend ordering an additional pinion shim assortment and an identical rear (large) pinion bearing to modify as a set up bearing for any new ring/pinion or diff carrier install. That way the pinion shim stack thickness can be adjusted and changed easily without destroying a new bearing each time.

        Helpful (0)
      • December 29, 2019

        5 2001 Bullitt - Joseph31 Installation Time: Full Day

        Rear end

        Got everything fast and great bearing was great can’t go wrong with ford performance

        Helpful (0)
      • November 19, 2019

        1 1994 Cobra - jake Installation Time: Shop Install Installation Cost: $100-$250

        Instal kit

        I thought the quality was great till a year later one of the shims broke cuaseing my gears to slide over and getting sheared apart i wish quality was better

        Helpful (0)
      • November 17, 2019

        5 2005 GT - JoeB Installation Time: Full Day

        Good kit

        Everything you need to install a new ring and pinion minus the gear oil and axle bearings

        Helpful (0)
      • October 30, 2019

        5 2014 GT - 14mustangowner Installation Time: Weekend

        Had everything we needed

        When changing gears you need this kit for your pinion bearing spacing. You will also need the other kit for your spacers for your diff. So this kit and bearing , the diff kit and bearings , the wheel bearings, 3 quarts of fluid. Ring and pinion gears of choice. Backlash is eight thousand to ten thousand, 22 pound of rolling torque on the pinion gear but takes about 220 pounds to crush the crush washer.

        Helpful (0)
      • September 23, 2019

        5 2006 GT - Kelly Installation Time: Shop Install Installation Cost: $250-$500


        Had it professionally installed with 4.10 gears and my 2006 Mustang is a beast now. Throttle response is at what every Mustang should be at. Gets up and goes like never before.

        Helpful (1)
      • August 19, 2019

        5 2008 GT - JamesW Installation Time: Full Day

        Everything you need!

        The kit comes with everything needed to do the job, skip the gasket and use ultra gray and a new diff cover with rear fill and drain ports

        Helpful (1)
      • August 05, 2019

        5 2004 GT - JuanG Installation Time: Weekend

        Best price

        For my 2004 GT differential rebuild Good quality and good price

        Helpful (0)
      • July 12, 2019

        5 2014 V6 - RichW Installation Time: Shop Install Installation Cost: $250-$500

        Preferred install kit

        If installing Ford performance gears, why settle for 2nd best, get Ford performance install kit as well

        Helpful (0)

      Questions & Answers (14 answers)

      5 Top Rated Questions

      If I buy this do I still need the pinion bearing for my 2013 v6 or does this come with it

      • This will come with the 2012 GT 500 High Torque Pinion Bearing.

      Helpful (1)

      What is the difference between this kit and the motive install and bearing kit?

      • The difference between the Ford Performance Ring & Pinion Installation Kit and Motive Rear End Installation Kit would be the high torque bearing. The Motive Rear End Installation Kit will come with the bearings and seals that you would need to change the rear end for your car. But, if you have a higher performance vehicle it is recommended to go with Ford Performance Ring & Pinion Installation Kit.

      Helpful (1)

      If I bought the Carbon Discs would I still be using all the parts supplied or will I have unused parts from this kit? I wanted to rebuild/beef up my diff since I'll have it opened.

      Is there a kit on the market that works with the 2013 GT500?

      Why does this kit not fit the 13-14 GT500? Mine has a torsen diff and from my knowledge the only difference is the larger inner bearing?

      • The reason being is the bearings that are included with the kit. For GT500s you will need a kit that will come with the correct bearings for your application.

      Helpful (0)
      Post Your Question
      9 More Questions
      Is this good for automatic 1 answer
      Would this kit fit on a 15-17 v6? If not, do you guys offer a kit for the s550's? 1 answer
      Does this kit inclide the Ford Part# 9L3Z-4630-A Bearing? 1 answer
      I have a 2014 GT with track pack - 3.73 Torsen diff and it is developing the dreaded "whine". Will this kit (and specifically the high torque bearing) fit my Torsen differential 8.8 rear end? Scott 1 answer
      The description for this kit states that this is a "complete kit", and also "Attention 2010 and newer... This kit includes the required 2012 Shelby GT500 High-torque pinion bearing." Which means that it does include the correct pinion bearing for, say, a 2012 V6. At the same time the site suggests to "Add 2010 8.8in Rear Gear Pinion Bearing" for additional price. Q: does or does not the kit have the correct rear pinion bearing included? 1 answer
      Will this kit work for installing the Boss 302 M-4204-MB differential in a 2007 8.8" rear end? Just asking based on the exclusion of the the 2013 Boss in the fitment. 1 answer
      Will it fit to my 2013-2014 Shelby GT500 Mustangs WITHOUT axle codes S-215-D and S-219-D. 1 answer
      would this kit fir the ford racing 4.56 gears.? 1 answer
      What's the difference between this kit with the high torque bearing and the one without which one is better for my car since it says they both fit? 2 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • Pinion shims
      • Carrier shims
      • Crush sleeve
      • Pinion seal
      • Pinion nut
      • Ring gear bolts
      • 2012 Shelby GT500 High-torque pinion bearing
      • Heavy duty carrier bearings
      • Cover gasket
      • Gear-marking compound

      Will It Fit My Mustang

      • Boss 302 - 12
      • Bullitt - 01, 08, 09
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
      • Cobra R - 93, 95, 00
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
      • GT500 - 07, 08, 09, 10, 11, 12
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 86
      • V6 - 11, 12, 13, 14

      Fits Mustangs equipped with a 8.8" rear end

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