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Differential Cover - 8.8 in. (86-14 GT, Mach 1; 07-12 GT500; 93-98 Cobra; 11-14 V6)

34 Reviews
Our Price

$139.46

  • Item #12160
  • Market Price $158.98
  • You Save 12% ($19.52)
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Customer Photos
Features
  • Heavy Duty cast aluminum
  • Dissipates heat faster
  • Prevents side load bearing deflection
  • Magnetic drain plug and bolts included
  • Fits 1986-2011 8.8" equipped Mustangs
Description
Durable, quality construction. This 8.8 inch Girdle Support System (a.k.a. differential cover) for 1986-2011 Mustangs features heavy duty, yet lightweight, cast aluminum construction, magnetic drain plug, and the required bolts. It substantially increases your rear strength, durability, and lifespan, and is a direct fitment to OEM 8.8” differentials. Superb characteristics under load. This 8.8" differential cover for 1986-2013+ Mustangs gives the old adage, “An ounce of prevention is worth a pound of cure” a whole new meaning! This cover gives much better heat dissipation and supports less side-to-side bearing deflection than stock.

Recommended Upgrade. When changing your differential cover it is recommended to upgrade to fresh Royal Purple Synthetic Gear Oil. You will need 3 quarts of Gear Oil.

Application. This Differential Cover is designed to fit the 1986 to 2013+ V8 Mustangs equipped with the 8.8" rear end and installs in approximately 30 minutes using basic hand tools. It does

not fit 1999-2004 IRS Cobra or 2012 Laguna Seca edition BOSS Mustangs or 2013-2014 GT500. Please note that this differential cover will

not fit gears higher than 4.10, it will only fit gears 4.10 and below.

Technical Note. Gasket not included. Manufacture recommends the use of a stock style gasket or a bead of Form-a-Gasket for a proper seal.

Mustang 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:
  • Fasteners
  • CNC Machined Billet Aluminum differential cover
Installation Info
Fitment
  • Boss 302 - 12, 13
  • Foxbody - 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
  • 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

Fits Mustangs equipped with a 8.8" rear end. This diff cover will <strong>not</strong> fit gears higher than 4.10. Does not fit 99-04 IRS equipped Cobras, 2012-2013 Laguna Seca edition BOSS Mustangs, or 2013-2014 GT500's.

Most Helpful Reviews View All

Overall Rating 4.4/5 Write a Review
5/5
Double check Allen Bolts!

Great, quality product for a great price but the Allen bolts that came with the cover were too long, thus causing a leak. I just got some lock washers that fit to extend the seal gap, or you could shave

Read More
Helpful (7) (0)

5/5
Undecided

I purchased this a few weeks ago and recently had it professionally installed with my new gears. The only problem I have is a leak. I used the gasket that came with the rear end kit I purchased (also at

Read More
Helpful (5) (0)

Customer Photos (4) View All

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Q & A (1 Questions, 1 Answers) Ask a Question

Pan hard bar Will this fit with the ford racing pan hard bar?

runninpony Year: 2012 Model: V6

Good Question (0) (0)
  • It worked on my 2013 GT when I bought it, but I didn't have the Ford Racing Panhard bar I had another brand

    Helpful (0) (0)

    TheMasterofFunkness Year: 2014 Model: GT

    Top 100 Contributor

Answer This Question

Reviews (34) Write a Review

  • 5 Stars .56 56%
  • 4 Stars .32 32%
  • 3 Stars .09 9%
  • 2 Stars .03 3%
  • 1 Stars 0 0%
4.4

out of 5 stars

32 Customers Recommend this Product

Installation Time:Afternoon

Installation Cost:0-$100

  • Performance Gain: 3.714286 3.7/5
  • Fit: 4.4375 4.4/5
  • Bang For Your Buck: 4.125 4.1/5
Filter By Sort By
  • 5/5

    Double check Allen Bolts!

    December 01, 2010

    Great, quality product for a great price but the Allen bolts that came with the cover were too long, thus causing a leak. I just got some lock washers that fit to extend the seal gap, or you could shave the bolts. If you experience leaking that's most likely your problem.

    Leo

    Driving Style: Daily Driver

    Helpful (7) (0)

  • 5/5

    Undecided

    October 13, 2010

    I purchased this a few weeks ago and recently had it professionally installed with my new gears. The only problem I have is a leak. I used the gasket that came with the rear end kit I purchased (also at AM) and maybe that is the issue. I'm buying a Ford gasket and will try again. I'm using RP fluids, so this is going to get expensive if I cannot seal it.

    Tracy

    Driving Style: Daily Driver

    Helpful (5) (0)

  • 5/5

    Granatelli diff cover

    November 10, 2010

    The piece is very nice but kind of heavy. Allen bolts a bit hard to get to at the top. i did have issues with it leaking. Took me and the diff. shop almost a week to figure out why it would seep oil? i dropped the cover twice in my garage in a attempt to stop the leak? Took it to aDiff shop and took them 2 days to figure out that the Allen bolts where too long so the cover never tightened! we had to shave every bolt so it would tighten properly.

    Will Samot

    Driving Style: Street / Strip

    Helpful (6) (1)

  • 4/5

    Good but a lil problem

    March 22, 2011

    The cover was great installed easy an no leaks. Did start noticing a problem after a few times a driving it. My cars lowered an the bearing support sticks out far enuff that when you hit a bump an the car bounces it comes up an hits the spare tire bump in the body. Right above it is also the return fuel line and it was trying to pinch it in to when it hit. Had to take it back off an reuse the factory one to keep from damaging the car anymore.

    Chad

    Year: 2003 Model: GT Driving Style: Street / Strip

    Helpful (3) (0)

  • 4/5

    Diff cover

    October 04, 2010

    Purchased this cover last month, very nice piece but i did not like the allen bolts cause of the slower time it took to button it up. The intructions did not have any specs on tightening them (lb-ft?)also missing was the main caps bolt specs on how tight 5lb-ft-10lb-ft? i also have an issue with it leaking? I installed it the first time, thought i might of done something wrong? Took it to diff shop, leaking again? Hopefully be fixed the 3rd time?

    Will

    Driving Style: Race

    Helpful (3) (0)

  • 5/5

    8.8 inch Girdle Support System

    December 30, 2010

    Outstanding fit and finish product. Easy to install and I did not have any leak issues. The only dislike I found was adding the 75w – 140 LUB what a PITA.

    Ken Sky

    Year: 2012 Driving Style: Show

    Helpful (2) (0)

  • 4/5

    Diff cover

    May 05, 2010

    This diff cover is just as advertised. It fits perfectly and does not leak. I am very satisfied. I would give a 5 star rating but I was expecting it to be a little bit lighter. Great product, highly recommended!

    Scott

    Helpful (2) (0)

  • 5/5

    04 GT

    April 05, 2010

    Great piece. Replaced the wimpy stamped cover when I had the gears changed. Looks much stronger and really looks great, especially after painting the axle

    Dickie Ayer

    Year: 2004 Model: GT

    Helpful (2) (0)

  • 5/5

    Beef cake!

    December 05, 2010

    this diff cover is a million times better then the stock cover. it might just be me but it feels like it does help hold my bearings in place and keep my 4.10's and track-lock on lock down. plus the drain and fill plugs make changing the gear fluid so much easier since you don't have to remove the whole cover anymore.

    TimmyGT

    Driving Style: Street / Strip

    Helpful (3) (1)

  • 5/5

    Rear End Differential Cover

    August 27, 2010

    Basic tools to install. Looks good and really dresses out the lower end. American Muscle shipped fast and all instructions were supplied.

    Steve Robertson

    Driving Style: Daily Driver

    Helpful (3) (1)

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