WIN $5,000 For Your Mustang! Enter Now
Talk to a Mustang Expert
1-888-332-7930
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

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

Market Price $160.38 You Save 13% ($20.92)

$139.46

FREE Shipping
  • Item 12160
In Stock Ships same business day. Choose options to add to cart

Features & Details

  • 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
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.

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
Will it fit my Mustang?
  • 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 not 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

4/5
missing parts

Nice part, but it was missing the gasket and one washer for the allen bolts.The local parts store had the gasket and the washer, but that was a extra trip and exspence I didnt need.

Helpful (1)

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 (8)

Overall Rating 4.3 out of 5 stars
Read All 37 Reviews

Customer Photos (6) Submit Your Photo

View All 6 Photos

You Might Also Like

1 Questions / 1 Answers

Ask a Question

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

runninpony

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

    TheMasterofFunkness

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

More Products You Might Like

Customer Reviews (37) Write a Review

Overall Rating 4.3

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Performance Gain 3.666667 3.7
  • Fit 4.35 4.4



  • 4/5

    March 25, 2011

    missing parts

    Nice part, but it was missing the gasket and one washer for the allen bolts.The local parts store had the gasket and the washer, but that was a extra trip and exspence I didnt need.

    Doug

    Year: 2003 Submodel: Mach 1

    Helpful (1) (0)

  • 5/5

    December 01, 2010

    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 the bolts. If you experience leaking that's most likely your problem.

    Leo

    Helpful (8) (0)

  • 5/5

    October 13, 2010

    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 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

    Helpful (5) (0)

  • 4/5

    October 04, 2010

    Diff cover

    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

    Helpful (4) (0)

  • 4/5

    March 22, 2011

    Good but a lil problem

    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 Submodel: GT

    Helpful (3) (0)

  • 5/5

    December 30, 2010

    8.8 inch Girdle Support System

    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

    Helpful (3) (0)

  • 4/5

    May 05, 2010

    Diff cover

    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 (3) (0)

  • 5/5

    April 05, 2010

    04 GT

    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 Submodel: GT

    Helpful (3) (0)

  • 5/5

    February 15, 2010

    Great!!!!!

    Bought it but still not sure if it helped me.... replaced whn i did the gears... im sure its stronger and reat price bieng ts the exact same one ffrp sels for 199.... american muscle is GREAT!!!!!!!!!!!!!!!

    John

    Year: 1999

    Helpful (4) (1)

  • 5/5

    December 05, 2010

    Beef cake!

    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

    Helpful (3) (1)

  • 5/5

    August 27, 2010

    Rear End Differential Cover

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

    Steve Robertson

    Helpful (3) (1)

  • 2/5

    Installation Time: Afternoon

    September 11, 2013

    Nice part but hardware is junk!

    Cover is very nice and sturdy but bolts that it come with are cheap looking and drain and fill plugs have magnets in them which is nice but not when they leak. The plugs are drilled and then a magnet pressed into it but they drilled too deep causing the oil to leak thru the drain plug. This is very upsetting considering the royal purple 75w-90 is not cheap at all. So before you fill the rear end up full of liquid hold buy you some drain plugs that seal and don't leak

    Ayellow1995

    Year: 1995 Submodel: GT Evansville, IN, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    August 18, 2012

    The Drake diff. cover project

    This is a very nice piece to add to any Mustang. My factory cover leaked and looked cheap. I chose not to un-bolt the massive rear sway bar on my Roush Stage 2 so it took extra time to slide the Drake cover into position. The bolts all fit fine but getting at them for torquing was not easy. The complete job took me 3 hours start to finish but I am meticulous. Here is a real tip, you only need 2 quarts of gear oil and 4-8 ounces of LSD additive to fill the differential housing. DP

    SilverS2

    Year: 2002 Submodel: Other Minnesota

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    May 10, 2012

    Does what is supposed to

    The cover fits great i also have noticed a small amount of oil around the bottom of the rear end only like a drop and there is never any on the ground so im not really concernd about it.only other thing is AM recommends 75W90 for 2004 or older cars, but the tag on my stock cover said to use 75W140 dont know if there is much difference between them.

    John87

    Year: 2003 Submodel: Mach 1 Aiken, SC, USA

    Helpful (1) (0)

  • 3/5

    Installation Time: Less than 1 Hour

    January 27, 2012

    Nice performance look

    The cover fits good and was a easy install. The only issue is the bolts are to long. They need to be cut or it will leak. Luckly thanks to another reveiw I checked before install and the they where right.

    Gt500

    Year: 2008 Texas

    Helpful (1) (0)

  • 5/5

    November 19, 2010

    8.8 rear diff cover

    This item was an easy install and a perfect fit. It looks good, doesn't leak and so far my 8.8 has held up to 538 rear wheel HP. I recommend this to anyone using an 8.8 rear end.

    Scott Steger

    Helpful (2) (1)

  • 4/5

    October 20, 2009

    Works!

    Girdle is the way to go if your improving your rear end!

    elvis

    Helpful (2) (1)

  • 4/5

    July 14, 2010

    diff cover

    replaced it on a gear install because the stock 1 was bent at the bottom, is heavy and strong, got it on sale here 2

    ma

    Helpful (1) (1)

  • 5/5

    January 27, 2010

    nice

    good product , easy ti install if you drop the panhard bar first

    jeremy

    Helpful (1) (1)

  • 5/5

    December 10, 2009

    sweet

    this is the best upgrade for that lil whimpy cover it comes with stock a must buy for all mustang owners

    ryan

    Helpful (1) (1)

Related Mustang Categories