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

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  • Item 21201
  • MPN# R8.8RMK

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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 8.8" rear end. When you're installing new gears in your Mustangs 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 insures 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 8.8" 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 Motive Bearing Kit is designed for use in Mustangs that have an 8.8" 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

    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 8.8" rear end. Does not include all bearings required for IRS Cobras

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    9 Questions / 8 Answers

    Ask a Question

    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?

    MattK

    • 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

      VincentV

    Helpful (4)

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

    ScottG

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

      Rob D

    Helpful (1)

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

    ncstang06

    • 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.

      LisaS

    Show 2 more answers Helpful (1)

    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?

    CCP11

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

      JeffAM

    Helpful (0)

    Will this work on a 99 cobra?

    AreYouPmsing

    • The Motive Rear End Installation and Bearing Kit does not come with all of the required bearings for the Cobras IRS. This kit will not wok.

      AM MikeW

    Helpful (0)

    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?

    GuillaumeH

    • This rear end install and bearing kit will work on a 2013 GT model Mustang.

      KevinD92

    Helpful (0)

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.8

    out of 5 stars




    • 5/5

      April 24, 2018

      Great installation kit

      Bought this because I was installing 4.10s. Came with everything I needed. Great kit.

      Blake06

      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      April 13, 2018

      Bearings

      Everything fit perfect very good kit, no leaks and everything seems to be working fine

      RedfireRed

      Year: 2003 Submodel: GT

      Helpful (1)

    • 4/5

      April 05, 2018

      8.8

      I used this kit to install 4.56 gears into a 8.8 that I am swapping into my Jeep. Everything worked out very well but I just wish it came with more crush sleeves. I am new to building differentials so it took many trials to get it right.

      JeffreyN

      Year: 2001 Submodel: GT

      Helpful (1)

    • 5/5

      April 02, 2018

      Awesome

      Best deal and fast shipping thanks american muscle

      Punisher98

      Year: 1998 Submodel: GT

      Helpful (1)

    • 5/5

      March 18, 2018

      Great product

      Every item fit perfectly, would buy again if needed.

      JariusG

      Year: 1986 Submodel: Other

      Helpful (2)

    • 4/5

      March 17, 2018

      Great install kit

      I haven't actuall used this install kit yet but have been told by friends that it's very good and a good value too. This install kit will be used on some 4.10 Ford Racing gears. Excited about the transformation.

      Andy

      Year: 2001 Submodel: GT

      Helpful (1)

    • 5/5

      March 15, 2018

      Nice

      Exactly what I need to install the ford racing gears.

      ChrisB

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      March 08, 2018

      Quality kit.

      Great kit, comes with all necessary hardware for a gear install. High quality bearings, races and shims at a reasonable price as you would expect from Motive Gear. Will definitely purchase again!

      James

      Year: 2006 Submodel: GT

      Helpful (4)

    • 5/5

      March 01, 2018

      amazing

      that installation kit hel me alot with mi 373s gears

      JavierC

      Year: 2013 Submodel: V6

      Helpful (3)

    • 5/5

      January 26, 2018

      Happy

      This kit literally comes with everything to install your gears I was a little worried I’d need to go to the parts store and get things but sure enough it had it all I would for sure buy this kit again

      LoganR

      Year: 2005 Submodel: GT

      Helpful (4)

    • 5/5

      January 15, 2018

      Great product

      Really a bang for your buck! What a difference this made in my car! Would recommend it to anyone!

      GianniR

      Year: 2007 Submodel: GT

      Helpful (3)

    • 5/5

      November 24, 2017

      Nice

      The shipping is good as always. Haven’t had time to use it yet but I am pretty sure they will be nice

      Tommyg

      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      November 15, 2017

      Motive Rear End Installation

      Great rebuild kit! It was easy to install and fits very nice! I installed it with my 3.73 gears runs great!

      DavidE

      Year: 1997 Submodel: Cobra

      Helpful (2)

    • 5/5

      November 10, 2017

      Motive Rear End Installation

      Went with this installation kit along with the gears I purchased, came with everything I needed to make installation easy and simple

      JerryD

      Year: 1996 Submodel: Cobra

      Helpful (1)

    • 5/5

      November 03, 2017

      Gear install

      Nice install kit. But if going to lower gear and need tune for speedodometter better send it in before install take sometime to get time back . Four days and counting

      bonetown

      Year: 2007 Submodel: GT

      Helpful (1)

    • 1/5

      October 17, 2017

      Ford Service Dept installed in 06 Mustang

      The product installed as per OEM installation and is performing well in daily use.

      EricA

      Year: 2006 Submodel: GT

      Helpful (2)

    • 5/5

      September 25, 2017

      Motive rear end

      The kit made my gear change easy to replace everything that was needed, no more whining from rear end end excellent products great price.

      FastOne

      Year: 2013 Submodel: GT500

      Helpful (1)

    • 5/5

      September 15, 2017

      2003 Mach 1

      Used to freshen up rear-end and put 4.10 gears in. AWESOME!

      DennisW

      Year: 2003 Submodel: Mach 1

      Helpful (1)

    • 5/5

      September 10, 2017

      Gears

      Love my new 3.73 gears thank you American muscle!!!!

      Esteban

      Year: 2004 Submodel: GT

      Helpful (1)

    • 5/5

      September 09, 2017

      Great product so far

      Install was easy and its a good product. Used this kit when changing out my 3.73s for 4.10s.

      BS

      Year: 2000 Submodel: GT

      Helpful (1)

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