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

Market Price $103.49 You Save 13% ($13.50)
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$89.99

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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

    CA Residents: Warning: California's Proposition 65

    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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    Questions & Answers (11)

    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)

    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

    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)

    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 (1)

    This kit does come with the rear Axel bearings? or do I need to purchase that separately for my 2014 V6 mustang?

    • Unfortunately, this kit would not include the rear axle bearings and would need to be purchased separately.

    Helpful (0)
    Post Your Question
    6 More Questions
    Will this be a complete kit for a 99 Cobra? 1 answer
    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? 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
    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
    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

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.8

    out of 5 stars




    • 5/5

      November 12, 2018

      Great mod!

      I was planning on upgrading my 3.15 gears to 3.73 after winter in the summer. However, my car had other plans. I developed some whining and issues with the rear. Instead of fixing the issue which would have been way cheaper. I decided since I am going to open it up I might as well upgrade. I have a few things to mentions if you are doing it yourself. This job is indeed a very messy job and requires a lot of work. We had done it on jacks, but I recommend finding a shop that can do it for a fair price. It is truly not worth doing it yourself. Also, you will need many specialty tools. Many of which you have to rent and some I had to purchase. Even with the right tools, there is still a lot you have to improvise yourself. Another mention is that you will need to buy a third bottle since you need to lube up the bearings as well as fill up the differential. When it comes to performance the car pulls very hard specifically if you have a tune on the car. I was quite surprised how the car had improved. I would recommend this mod hands down, but you really have to decide if you want to install it yourself.

      LukaszF

      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      November 06, 2018

      Rear end kit

      I bought this along with SR performance 3.73 gears. I haven’t installed the yet but I’ve payed everything out and The kit has everything needed to do the job.

      Bowdish09

      Year: 2006 Submodel: GT

      Helpful (1)

    • 2/5

      October 13, 2018

      Shims aren't the right size for the 98 cobra

      This kit will not fit perfectly on a 98 cobra rear end. I took my car to the shop to have them install this kit along with new 3.73 gears and they had a lot of trouble with the fitment of the shims included in this kit. It took them an extra two days to get the job done due to the poor fitment. Because they are a quality shop, they wouldn't risk just giving me back my car with the ill fitting parts I brought them so they took it to a specialized rear end shop to have them install properly fitting shims in order to have the car running and feeling 100 when they gave it back to me. Maybe if I would have gone with the Ford Racing kit I would not have had this problem but I guess I will never know unless I rebuild another similar rear end in the future.

      MarvinL

      Year: 1998 Submodel: Cobra

      Helpful (1)

    • 5/5

      October 01, 2018

      5.0 Purchase!

      30 year Master Mechanic says this kit has it all, 5.0 Purchase!

      BradMacK

      Year: 2005 Submodel: GT

      Helpful (1)

    • 5/5

      September 25, 2018

      Motive kit

      Contains everything you need for a ring and pinion gear change.

      wildwilly

      Year: 2008 Submodel: GT

      Helpful (1)

    • 5/5

      September 07, 2018

      2008 P71

      Being on a low budget after three open heart surgeries, this good priced and high quality product was perfect for the 4.10 posi install.

      JamesM

      Year: 2004 Submodel: GT

      Helpful (4)

    • 4/5

      September 06, 2018

      3.73's

      Good less the cheesy housing gasket . The 3.73 gears turned out great !

      mark

      Year: 2014 Submodel: V6

      Helpful (2)

    • 5/5

      July 08, 2018

      Good kit

      A need for a regear. Has everything you need but the oils

      AlexR

      Year: 2005 Submodel: GT

      Helpful (2)

    • 5/5

      July 03, 2018

      Good!

      Good parts will continue to order from American muscle! Shipping is usually fast but could be faster!

      PaigeC

      Year: 2003 Submodel: GT

      Helpful (3)

    • 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 (3)

    • 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 (3)

    • 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 (3)

    • 5/5

      April 02, 2018

      Awesome

      Best deal and fast shipping thanks american muscle

      Punisher98

      Year: 1998 Submodel: GT

      Helpful (3)

    • 5/5

      March 18, 2018

      Great product

      Every item fit perfectly, would buy again if needed.

      JariusG

      Year: 1986 Submodel: Other

      Helpful (3)

    • 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 (3)

    • 5/5

      March 15, 2018

      Nice

      Exactly what I need to install the ford racing gears.

      ChrisB

      Year: 2004 Submodel: GT

      Helpful (4)

    • 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 (5)

    • 5/5

      March 01, 2018

      amazing

      that installation kit hel me alot with mi 373s gears

      JavierC

      Year: 2013 Submodel: V6

      Helpful (4)

    • 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 (5)

    • 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 (4)

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