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

Item 21201
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    Features, Video & Details

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

    Review & Installation Video

    Review & Install Video

    Stephanie with americanmuscle.com 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 americanmuscle.com. 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 americanmuscle.com.

    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 - www.P65Warnings.ca.gov

    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
    Installation Info
    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

        Questions & Answers (13)

        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: https://www.americanmuscle.com/2010-mustang-gears.html#shop-by7

        Helpful (5)

        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

          Customer Reviews (100+) Write a Review

          Ratings Summary

          4.8 out of 5 overall rating from 100+ customers




          • 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 (0)
          • 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

            Perfect

            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)
          • June 02, 2019

            5 2005 GT - RonaldG

            Differential Rebuild

            This is one of the most complete rebuild kits I have seen on the market. My dad always told me not to do anything halfway. Go all the way and do a good job.

            Helpful (0)
          • May 29, 2019

            5 2006 GT - Jim

            Worked Perfect.

            all parts fit perfect. It came with everything needed to replace the ring pinion

            Helpful (0)
          • May 13, 2019

            5 2003 GT - Dshowalter23

            Great kit!

            This kit is everything you need for doing a gear set. Well put together and quality of bearings/seals are superb! Highly recommended!

            Helpful (0)
          • May 05, 2019

            5 2010 GT500 - MustangCountry

            Perfect product got the job done

            Perfect fit and all you need to fix the problem will buy again

            Helpful (0)
          • April 25, 2019

            5 2014 GT - DirtyRod

            Works Great

            Everything you need to get it done! Everything was in the kit but gear oil.

            Helpful (0)
          • April 22, 2019

            5 1989 LX - Andrew6

            Great Packaging

            Came with everything I'll need to do a diff and gear change on my notch. Top quality.

            Helpful (0)
          • April 12, 2019

            2 2013 V6 - Disappointed

            not enough variety of shims

            I read a review before purchasing that said there wasn't enough variety of shims and i thought i'd take a chance, but they were right. After my Ford mechanics tried to install the gear there wasn't enough shims in the kits and now i have to buy a lot of replacement parts, i.e. pinion bearing, crush sleeve and a bunch of shims. about 300.00 worth.

            Helpful (0)
          • April 11, 2019

            5 1992 LX - Aaronthebaron

            Oh yea, she'll go

            I switched from 3.73 to 4.10s and noticed a huge difference of the line. best bang for getting up to speed and "grabbing" the power to the wheels. Not the best for gas but thats not why you get them.

            Helpful (0)
          • April 04, 2019

            4 2010 GT - ShannonS

            Good

            Everything I needed in 1 kit but 1 $60 bearing that I had to buy separate since they changed it for my year 2010. It's working great

            Helpful (0)
          • March 25, 2019

            5 1996 GT - JacobC

            Great parts exact fit to my 8.8

            Awsome product saved a lot of hassle with this kit

            Helpful (0)
          • March 25, 2019

            5 2007 GT - Enthusiast

            Easy install

            My mechanic said it was all neat and organized, and good quality.

            Helpful (0)
          • March 18, 2019

            5 2013 GT - MichaelP

            Great Bearing and Install kit.

            Great install kit with quality bearings and shims. I recommend Motive Rear End kits for every car enthusiasts Street or drag racing this kit is easy to install and works fantastic.

            Helpful (0)
          • March 16, 2019

            4 2003 GT - Timothy

            Bearings fit with no issues!

            Wasnt to happy about the pinion seal, it poured gear oil out as fast as i put it in. Must have been a defect. Luckily i work at an automotive repair shop and ordered a new pinion seal from them, had to order new one because i drove my mustang in the service bay and it was my ride home. Fortunately i ordered it 15min before delivery cut off at 2pm on a saturday. Only took me 3 hrs do do the job.

            Helpful (1)

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