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

Item 21201
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      Review & Installation Video

      Stephanie with here with my breakdown of the Motive rear end installation and bearing kit for all Mustangs with 8.8 rears, or in other words, all '86 to '14 V8s and '11 to '14 V6s. Ford's 8.8 rears are as stout as can be, almost the 9 inch of our generation. But, any time you're pulling the rear apart, whether you're just changing your rear gears or doing some maintenance on a higher mileage vehicle, it makes sense to install new seals and bearings while the housing is apart. It's never a good idea to redo a rear end using original bearings and bolts.Before I get too far into laying this kit out for you guys, I want to take a closer look at the brand, Motive. Motive Gear has been offering some of the highest quality drivetrain components on the market today for quite some time. You can find their logo on many drag cars including a large handful of Mustangs that participate in any major racing series, including the NMRA, NMCA, and NHRA.This Motive rear end install and bearing kit includes all of your bearings, seals, shims, and bolts, even down to the gear marking compound and Loctite. If you didn't know already, starting in 2010 Ford changed the inner rear gear pinion bearing in the 8.8 rear. This means that all of you 2010 and up owners will need a new 8.8 pinion bearing for proper installation which can be selected from the drop down menu on the product page at Click below to head back to the site if you aren't already there to see what I'm talking about.Installing this kit requires a higher level of mechanical expertise or even the help of a professional. If you're not familiar with setting backlash and pinion depth then I would recommend having a professional install this kit. In fact, a lot of our customers are letting us know that they did just that. They purchased the kit and had a professional install it to make sure that the proper gear mesh pattern was established. If you are tackling this job yourself, you're probably looking at about four hours of install time which can be made easier with the use of a lift and all of the proper tools necessary. But, it can still be done with the use of a jack and some stands. If you guys have any questions about this kit or the install, you can always reach out to a Mustang expert at any time.If you're installing some new rear gears or freshening up your Mustang that has some good mileage on it, you definitely need to check out the Motive rear end install and bearing kit for your 8.8 equipped V8 or V6 Mustang available here at

      Product Information

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


      • Use When Rebuilding / Modding 8.8" Rear End
      • Includes All Bearings and Seals
      • For Ford 8.8" Rear End
      • Insures Against Future Problems


      Everything Needed to Rebuild 8.80-Inch Rear End. When you're installing new gears in your Mustang's rear differential, it just makes sense to install new seals and bearings while the housing is apart. This is particularly true if your pony has more than 60,000 miles on it. It ensures against the need for another costly teardown and rebuild.

      Attention 2010 and Newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.80-inch equipped Mustangs. With that in mind, you will require a new 8.80-inch rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

      Application. This Motive Bearing Kit is designed for use in Mustangs that have an 8.80-inch rear end differential.

      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# R8.8RMK

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 100+ customers

      • February 21, 2020

        4 2012 GT - brion

        works well.

        make sure you get the right pinion bearing. the one in this package wont work in the 2011 and beyond mustangs

        Helpful (0)
      • January 30, 2020

        5 2001 GT - Chrisand01gt

        Rebuild Kit 8.8 rear end

        Got the kit and it’s nicely put together! Did not take long at all to get to my house and I cant wait to install it!

        Helpful (1)
      • January 18, 2020

        5 2008 GT - NVPerformance

        Perfect bang for your buck

        Only wanted 4.10s to test on street and my god let me tell you this will wake up your 3v like no tomorrow. Kiss bogging on the line goodbye. If it’s your daily these are still perfect. I cruise around 75mph at around 3k rpms. Not a noticeable drop. Literally perfect bang for your buck. I had a shop do it and only took them an two hours.

        Helpful (1)
      • October 19, 2019

        5 2010 GT - DaveS197

        Complete kit

        Nice kit from a reputable company. Every thing you need for your install.

        Helpful (0)
      • September 04, 2019

        5 2005 GT - Jeff

        Worked great

        Everything is great so far. The install went smoothly with the shims provided. The only thing I wish had been in the kit would have been an extra oil slinger, so try not to destroy the old one when removing the old pinion seal. Also, put penetrating fluid on your panhard rod bolts like every day for a week before you start this project if you've never had it out before. I had to cut mine out and you don't have a lot of room in there to work a grinder.

        Helpful (1)
      • September 03, 2019

        4 2007 GT - Jackrod

        Great kit for a good price

        Everything needed to do the job is in the kit. Comes packaged separated and neat. Well worth it when installing a new ring and pinion.

        Helpful (0)
      • August 23, 2019

        5 2014 V6 - CrazyCooter

        Worked Great

        Everything you need is here (except a rear pinion bearing which you need to buy separately). I used this Motive Gear kit to install Ford Racing gears with no problem.

        Helpful (0)
      • July 17, 2019

        5 1998 GT - Jgib4

        Great product

        Great product, make sure to grab the shim kit along with it

        Helpful (1)
      • July 15, 2019

        5 2001 GT - ChuckS


        Everything you need! Fit great, no issues at all. Would recommend

        Helpful (0)
      • June 25, 2019

        1 1999 GT - RobertGoose

        3.73 gears

        Didn’t come with enough shims had to buy more I’ll never shop here again

        Helpful (0)

      Questions & Answers (13 answers)

      5 Top Rated Questions

      I have read the contents of this kit, I have watched the video, but I STILL DON'T KNOW if this kit includes the rear gear pinion bearing kit necessary for 2010 Mustang gear swaps? And this is from a person who reads, writes and interprets complex written language for a living... Also, can not find this "drop-down" menu you are talking about in the video. You warn about it being necessary all the time, yet do not state clearly if this bearing kit contains it or not. Please indicate this CLEARLY for everyone to see, it is really confusing. Apart from that (assuming the kit DOES NOT include the rear, which I seem to deduct from one of the answers for previous questions), why make a bearing kit without the most important and needed bearing? Does ANY kit you sell include this 2010 rear gear pinion bearing (maybe those big kits with bottles for 279$ or any other kits by Ford?) or the only way is to buy the bearing separately?

      • We do apologize that the listing is not clear enough. The Motive Rear End Installation and Bearing Kit does not include the Rear Gear Pinion Bearing for 2010-2014 Mustangs. The bearing is not included in the kit because the kit is designed for 1986-2014 Mustangs, and it is not necessary for the majority of the years this kit works on. It is included in the Gear Combo Kits for the 2010-2014 GT and 2011-2014 V6 Mustangs found here:

      Helpful (8)

      What type of bearing come in this kit? Koyo or Timken?

      • This Motive Rear End Installation and Bearing Kit - 8.8 in. (86-14 V8; 11-14 V6) kit is going to have Timken pinion bearings and Koyo carriers.

      Helpful (4)

      Whats the difference? What is the difference between this kit and the kit for 35 dollars?

      • This kit comes complete with everything you need for a full rebuild: bearings, shims, crush sleeve, etc... The $35 kit is a basic kit that is the same as the more expensive version, but there are no bearings included. We highly recommend getting the complete kit and replacing all your bearings and shims at the same time to prevent any costly problems down the road. It's better to replace them all at once, rather than having to tear the car apart again just for a bearing gone bad.

      Helpful (2) Show 2 more answers

      I plan on adding the 2012 Boss 302 Torsen differential to my 2011 Mustang GT. Is this the proper kit I will need to freshen up rear end when I have the Torsen installed? The stock rear end has about 41k on it and 3.73 gears. And will the kit's cover plate seal work with the aluminum differential cover plate?

      • This Motive Rear End Installation and Bearing Kit does indeed come with everything needed to install new gears into a new differential.

      Helpful (1)

      Do you know if these kits will fit a 99 f150 4x4 with an 8.8 rear gear?

      • The Motive Rear End Installation and Bearing Kit will work with pre 2015 8.8 rear axles.

      Helpful (1)
      Post Your Question
      8 More Questions
      I am replacing the entire axle housing on my 14' GT. It appears this kit has everything I need for the housing swap. The original housing has damage. I need to confirm if this kit does actually have all the parts needed for the swap. (Besides gear oil) Thank you I already purchased new axles from you guys. 1 answer
      I'm looking at this kit for my 2014 V6 mustang to go with 3.55 rear gear set, would this be the full set without the gears and oil like the complete 3.55 kit you have that always seems to be out of stock. Would this be virtually the same? Or is there anything else required for the kit to make it a complete rear gear kit? 0 answer
      The picture shows both carrier bearings and both pinion bearings. But I seen where another guy asked if it came with the pinion bearings and it says no. Did this change from then. I just need to know if the kit comes with pinion bearings to fit my 2013 mustang gt? 1 answer
      This kit does come with the rear Axel bearings? or do I need to purchase that separately for my 2014 V6 mustang? 1 answer
      Will this be a complete kit for a 99 Cobra? 1 answer
      Will this work on a 99 cobra? 1 answer
      Hello, I have just received my item today (in France). I have seen on motivegear website that this kit (R8.8RMK) does not fit 2013 mustang GT. Can you confirm that? 1 answer
      4.10 gears installation kit I recently purchased the 4.10 gears for my 2006 mustang GT and I'm not sure which installation kit I should buy !! Is this the right one !?! 4 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      Hardware included:
      • Front & Rear Pinion Bearing
      • Pinion Seal
      • Carrier Bearings
      • Carrier Shims
      • Differential Bearings
      • Crush Sleeve
      • Pinion Nut
      • Cover Gasket
      • Ring Gear Bolts
      • Brush
      • Gear Marking Compound
      • Loctite

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • 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 8.80-inch rear end. Does not include all bearings required for IRS Cobras

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