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Motive Rear End Installation Kit - 8.8 in. (86-14 V8; 11-14 V6)

Market Price $35.99 You Save 17% ($6.00)
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  • Item 21203
  • MPN# F8.8IK

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Complete Rebuild Kit
  • Essential on 60,000+ Mile 'Stangs
  • Ideal for Rebuilds or Gear Swaps
  • Includes All Seals & Hardware
  • Fits Ford 8.8" Rear End
Install or Rebuild. Don't be caught without the seals or hardware you need when doing your gear swap or rebuild. A Motive Install kit has everything to make installing new gears or rebuilding your 8.8" rear easy and painless.

Extra Insurance. If you're installing new gears, a Motive Install kit is extra insurance against future problems. Any Mustang can benefit from fresh hardware in the differential to ensure your gears perform flawlessly. However it is highly recommended to add this kit to your new gears for any Mustang with over 60,000 miles, since your differential's hardware is probably worn down and you can combine labor costs to save money.

Complete Kit. This kit has all the components of the Motive Installation Kit, including pinion seals, gaskets, hardware, marking compound and brush, and even Loctite. It is the same as the Motive Bearing kit without bearings.

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 Install Kit is designed for all 1979 to 2014 Mustangs with the 8.8" rear end.

Fitment: 1979 1980 1981 1982 1983 1984 1985 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:

  • Pinion Seal
  • Carrier Shims
  • 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
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 11, 12, 13, 14
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 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, 13, 14

Fits Mustangs equipped with a 8.8" rear end

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Most Helpful Reviews

install kit

Well made kit strong an very durable. The only problem there are no instructions, nothing. Just the parts. So if you haven't done this before you are in for a treat!

Helpful (1)


Rear end kit

If you know what you're doing then its an easy install, if not then please go to a shop. Good deal on a kit that literally has everything you need for install.

Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 21 Reviews

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Customer Reviews (21) Write a Review

Overall Rating 4.9

out of 5 stars

  • 5/5

    February 06, 2017

    Gear install using Motive Install kit

    The kit has everything needed to do a gear swap. Well packaged and layed out.


    Year: 2006 Submodel: GT

    Helpful (1)

  • 4/5

    August 12, 2016

    Came exactly as described

    No issues with fitment or delivery. Great product so far.


    Year: 2007 Submodel: GT

    Helpful (1)

  • 5/5

    June 24, 2016

    Works great!!

    Came with what I needed to reshim my rear. Shipping was fast.


    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    June 02, 2016


    I saw this for sale here and couldn't let it slip away. I love the great low prices, great deals here for us Ford guys.. Gasket included..


    Year: 1996 Submodel: GT

    Helpful (1)

  • 5/5

    May 17, 2016

    Bang for your buck

    Kit came in early, everything I needed. Really satisfied with this kit!!


    Year: 1994 Submodel: GT

    Helpful (1)

  • 5/5

    March 09, 2016

    install kit

    Well made kit strong an very durable. The only problem there are no instructions, nothing. Just the parts. So if you haven't done this before you are in for a treat!


    Year: 1990 Submodel: GT

    Helpful (1)

  • 5/5

    February 29, 2016

    Nice install kit

    This kit comes with all of the shims needed to install your gear set plus a few extra. It also comes with the marking compound and a brush. Very nice kit, if I ever need another one I will definantly buy this one again.


    Year: 1996 Submodel: Cobra

    Helpful (1)

  • 5/5

    April 07, 2015

    Rear end kit

    If you know what you're doing then its an easy install, if not then please go to a shop. Good deal on a kit that literally has everything you need for install.


    Year: 2003 Submodel: Cobra Malvern, PA

    Helpful (1)

  • 5/5

    March 30, 2013

    Installation kit

    American muscle has great sales people. They know exactly what they are talking about! I bought this kit for install on my 03 mustang GT 4:10 gear and I had it shipped to my house within 2 days. Thanks American Muscle! Great kit. Had everything I needed.


    Year: 2003 Submodel: GT Peoria, IL, USA

    Helpful (1)

  • 5/5

    October 20, 2010

    Great buy!

    My diff needed a complete rebuild and this installation kit was awesome. It had everything my mechanics shop needed to put my rear end back together. Would definitely recommend this kit anytime your changing rear gears!

    Sarah M

    Helpful (2)

  • 5/5

    October 14, 2010

    motive 8.8 gear install kit

    The install kit came with everything needed to install my 05 gt. It was a great kit and the gears really woke my car up. I reccomend to everyone get the gears and the install kit and your stang will move!!

    branden wilson

    Year: 2005 Submodel: GT

    Helpful (1)

  • 5/5

    May 27, 2010

    install kit

    this is a great kit to have when doing gears.


    Helpful (5)

  • 5/5

    July 23, 2014

    Good Deal

    This kit is a great deal if you are installing a new gear, it has all the things necessary at a great price , without having to pay for stuff you won't/don't need!!


    Year: 2003 Submodel: Mach 1 Texas

    Helpful (1)

  • 5/5

    September 10, 2013

    Makes the job easy

    This kit was great and had all the items I needed to get the job done like a professional. I highly recommend this product!


    Year: 2008 Submodel: GT Florida, USA

    Helpful (1)

  • 4/5

    April 13, 2012

    Great price

    Nice kit,Only concern I have is that the ring gear bolts are grade 5 and not grade 8 that comes factory.


    Year: 2010 Submodel: GT Reno NV

    Helpful (1)

  • 5/5

    October 14, 2010

    Motive Installation Kit

    This is does exactly what you need it to do! At first I thought I wouldn't need any installation kit, but I soon learned I AT LEAST needed me..If I didn't need it I wouldn't get it. I did find that on my 99 gt, I needed the bearing as well, as I have 130000+ miles, so if you have an older model you should definitely get the bearing kit. All in all though this was what I needed for the install. Good quality

    Zach Rasmussen

    Year: 1999 Submodel: GT

    Helpful (1)

  • 4/5

    October 14, 2010

    A complete kit

    The kit was rather complete, even including a small acid brush along with plenty of marking compound. The parts themselves were easily installed with the correct tools, however the bearings and other parts were not clearly labeled. Your best bet is to go slow and match up the old parts to the new ones before you pull everything apart.

    Adam T

    Helpful (1)

  • 5/5

    January 22, 2008

    good value

    Man, what a good value, and free shipping, you can\\\'t go wrong!

    clayton yates

    Helpful (3)

  • 5/5

    May 23, 2010

    gear install kit

    Great item with fast shipping. Made install painless free easy and fast

    Israel. Rosales

    Helpful (2)

  • 5/5

    December 06, 2010

    great kit

    made install very easy


    Helpful (0)

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