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1999-2004 Mustang Drivetrain
1999-2004 Mustang Gears
Ford Performance Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 03-04 Cobra & 13-14 GT500)

Ford Performance Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 03-04 Cobra & 13-14 GT500)

100+ Reviews 16 Answers

Market Price $209.99 You Save 12% ($25.00)

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$184.99

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Ford Performance Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 03-04 Cobra & 13-14 GT500)

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Features, Video & Details

Increases Strength, Prevents Side Load Bearing Deflection
Light-weight Cast 356T6 Aluminum Construction
Low Profile Design with Bearing Cap Support
Dissipates Heat - Increase Gear Life
Features Engraved "Ford Racing" Logo
For use on 8.8" Solid Axles
10 Bolt Cover
Direct Bolt-on Replacement
Fits 1986-2014 8.8" Equipped Mustangs, Excludes 03-04 Cobra and 13-14 GT500

Product Resources

Customer Photos (64) Customer Reviews (100+) Questions (17) & Answers (16)

Review & Installation Video

Review & Install Video

Stronger Than Stock. When upgrading the rear gears in your Mustang it's also a good idea to replace the wimpy stock differential cover with a super strong, Aluminum Differential Cover for additional safety and peace of mind. This low profile Ford Racing Differential Cover features load bolts that provide additional support for the differential bearing caps which prevent side-to-side deflection.

Cast Aluminum Construction. Made in the USA Ford Performance manufactures their Low Profile Differential Cover from 356T6 cast aluminum for superior strength and light-weight. The 356T6 aluminum construction helps to dissipate heat much quicker than the stock unit, which in turn helps to prolong the life of your Mustangs ring and pinion gears. As an added bonus the Cover has the "Ford Racing" logo engraved directly on it.

Direct Bolt-On Installation. Ford Performance designed their Differential Cover to be a direct bolt-on upgrade for your Mustangs factory differential cover. With the included gasket, bolts and washers this Cover can be installed in about an hours’ time.

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

Application. This Ford Racing Differential Cover is designed to fit the 1986-2014 Mustangs equipped with an 8.8" solid rear axle, including the 2011-2014 V6, 1986-2014 GT, Bullitt, Mach 1, 1993-1998 SVT Cobra, and 2007-2012 Shelby GT500 models.

Application Note. This Ford Racing Differential Cover will not fit 1999-2004 SVT Cobras equipped with an Independent Rear Suspension (IRS), or 2013-2014 Shelby GT500 models.

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

MPN# M-4033-G2

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

What's in the Box

Hardware included:

(1) Axle Girdle Assembly
(1) Axle Girdle Gasket
(10) Washers
(10) Bolts

Installation Info

Installation Time: (approx) 1 Hour

Difficulty Level:Light to Moderate mechanical skill required.

Installation Guides:

Customer Submitted:
How to Install a Differential cover on your 1986-2013 Mustang GT, Mach 1, Cobra, GT500 and V6

Tech Specs

Tech Guides:

Fox Body Rear Gears & Ratios Explained

Will it fit my Mustang?

Boss 302 - 12, 13
Bullitt - 01, 08, 09
Cobra - 93, 94, 95, 96, 97, 98
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 - 79, 80, 81, 82, 83, 84, 85, 86
V6 - 11, 12, 13, 14

Fits Mustangs equipped with a 8.8" rear end only. Does not fit 1999-2004 IRS equipped Cobras or 2013-2014 GT500 models.

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Ford Performance Traction - LOK Rebuild Kit w/ Carbon Discs - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500) $112.99

Customer Photos (64) Submit Your Photo

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Questions & Answers (17)

5 Top Rated Questions

will this fit with 4.10 gears?

I have a 2005 Mustang with 4.10 gears and this fit perfectly.
Yes, this will fit any ratio gear in the 8.8 inch diff.
Yes it will
Yes! 4.10 gears will fit under this Diff cover! A good gasket will also help you get a little extra Space for good fluid flow.

Helpful (1) Show 3 more answers

Will this differential cover work with the BMR Hammerstone watts link?

Does this cover have the same amount of clearance to the rear as the finned GT500 cover? If not, how much thicker is it?

Will this cover work with 4.56 gears? Thanks God bless!

This cover is compatible with 4.56 gears.

Helpful (0)

Is that a fill and drain plug on the cover? I know that there is a fill plug on the other side of the diff from factory but hard to get at, so this would make it easier if it is. Also do you offer something to make getting the oil into the case easier?

The Ford Performance Differential Cover has a fill port on the upper passenger side of the cover, a drain on the lower passenger side, and two adjusters for the braces on both sides on the raised section. We do not offer anything that helps with filling the diff, however a section of tubing on the bottle can be used to help in filling the diff, or a fluid transfer hand pump.

Helpful (0)

Not finding an answer? Ask your question! Post Your Question

10 More Questions

Will this clear whiteline sway bar and whiteline panhard bar? 1 answer

The Ford Performance Differential Cover will clear with your Whiteline Panhard Bar and Sway Bars.

Helpful (0)

How much fluid does does rear end take with this cover? 1 answer

You will need 3 quarts of gear oil when using this Ford Performance Differential Cover.

Helpful (0)

When installing this diff cover, can I use silicone instead of the gasket it comes with? I've heard the diff starts leaking quickly with the gasket. Thanks. 1 answer

When installing the Ford Performance Differential Cover you can utilize the existing gasket, RTV silicone sealant, or a combination of the two. If using an RTV sealant, we recommend utilizing a RTV Black sealant such as that offered by Permatex, or equivalent.

Helpful (0)

Will this cover clear all aftermarket panhard bars and sway bars? Even on lowered cars? 1 answer

This cover will clear after market sway bars, panhard bars, and the car being lowered yes!

Helpful (0)

Does it work with 4.10 2008 mustang gt 1 answer

This Ford Performance Differential Cover will work with a 4.10 ring and pinion ratio in a 8.8" differential.

Helpful (0)

I am going to change my diff.cover(GT/CS '08) and already bought 2 quarts of oil and bottle o friction modifier.You just wrote it is enough amount of liquid and in other sites it Yours it is written that you need one extra bottle of oil.Could You tell me what is correct amount of oil 2 or 3 quarts and a friction modifier.thanks 1 answer

For an 08 GT 8.8in differential, you will need 2 quarts of oil and a bottle of friction modifier.

Helpful (0)

Does this actually fit a 13-14 Shelby or does it say 07-12 for a reason? 1 answer

This will not fit the 2013-2014 GT500 models as they have a different size differential cover than the previous years.

Helpful (0)

Will this fit my 2009 Shelby GT500 without having to install a panhard bar relocation bracket, like you do with Shelby's Performance differential cover? And what keeps the bearing load bolts from leaking? 1 answer

The Ford Performance Differential Cover - 8.8 in. will fit the 09 GT500. The differential cover also comes with seals for the bolts.

Helpful (0)

I RECENTLY HAD PURCHASED THIS PRODUCT AND INSTALLED IT MYSELF. MY QUESTION IS ON MY COVER ABOUT 2000MILES LATER ITS LEAKING FROM THE LOAD BOLTS, WONDERING WHAT SHOULD I DO? 1 answer

Sorry about the issue you are having with your Ford Performance Differential Cover, for further assistance please email or call us! http://www.americanmuscle.com/contact.html

Helpful (0)

With this diff cover, when filling the rear axle with new fluid do we just fill until it starts to drip out? 1 answer

Capacity will be about the same. 2 quarts of gear oil and 4 oz of friction modifier. Level should be about 1/4" below the full plug. Use your pinky finger the reach in and check the level. Always level the car before checking.

Helpful (0)

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Customer Reviews (100+) Write a Review

Overall Rating

4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

Performance Gain 4.206349 4.2
Fit 4.954198 5.0

no one in the world ever gets what they want, and that is beautiful

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5/5

Installation Time: Less than 1 Hour

February 13, 2019

Built and Nice

Cover is heavy duty and looks like it, bit not to bulky...Casting and machining is done well...Plus you are flying the Ford flag with this cover

DanielO

Year: 2008 Submodel: GT

Helpful (0) Thanks for your input!
- Performance Gain 4
  4
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

February 12, 2019

Looks

The item is a aswosome pice to add to your mustang it give it a muscle look that ever one looks at and always say where did you get it from and I tell them AM. Com

KevinB

Year: 2008 Submodel: GT

Helpful (0) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

February 03, 2019

Great performance and looks!!!

I loved the looks of it right out of the box and it fit perfect!! I liked the oil fill port and the temp sensor port on it!! The structure support is really nice also!!

JacobK

Year: 2008 Submodel: GT

Helpful (1) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

January 23, 2019

looks great

it looks great very well made easy fill up with gear oil and also easy to install i dont have high tools just a jack and jack stands and got it done in a couple of hours

Michael

Year: 2013 Submodel: GT

Helpful (1) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5
January 22, 2019

Great

It looks good AmericanMuscle has the part and the delivery was quick

Jeff

Year: 1989 Submodel: LX

Helpful (1) Thanks for your input!
- Performance Gain 1
  1
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

January 21, 2019

Very Nice Piece perfect fit

American Muscle had the best price around for this differential cover.

50gt

Year: 1993 Submodel: LX

Helpful (1) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

January 21, 2019

Rear Diff

Well built and very nice looking. Also put a Lube Locker gasket on .

JohnG

Year: 2005 Submodel: GT

Helpful (1) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

January 18, 2019

Sweet

Looks great, easy to install. Had to remove the factory panhard bar for access. Very happy with final appearance.

Tugger

Year: 2008 Submodel: GT

Helpful (1) Thanks for your input!
- Performance Gain 3
  3
- Fit 5
  5
5/5

Installation Time: Shop Install

Installation Cost: $100-$250

December 10, 2018

Ford Performance Differential Cover

This cover is high quality with a great finish. Very happy with the fitment and results.

Tristen

Year: 1989 Submodel: GT

Helpful (2) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

November 29, 2018

03 mach 1

This is awesome nice and easy install went on in no time

KurtisK

Year: 2003 Submodel: Mach 1

Helpful (2) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5
November 21, 2018

Gorgeous!

Well manufactured and looks great, to bad you can't see it unless you are laying on the ground.

ScottF

Year: 2008 Submodel: GT

Helpful (3) Thanks for your input!
- Performance Gain 3
  3
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

November 02, 2018

Looks Great!

Fits great, looks great, was easy to install will make future diff fluid changes much easier!

ThomasA

Year: 1991 Submodel: LX

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

October 26, 2018

Dif gerdal!

Nice solid product. FORD PERFORMANCE! says it all.

JoeyJ

Year: 2003 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

October 22, 2018

Quality part

It was time to change the fluid - and I just couldn't put that stamped piece back on. I like the fact that now I have a drain plug to make next time much easier. I used the supplied gasket with no rtv - and it has held up with no leaks. Do yourself a favor and drop the panhard bar

RandalM

Year: 2006 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

October 20, 2018

Nice Cover!!!

Upgraded to Ford Performance 3.73 gear kit, Yukon Differential, and added this cover. Looks great...

JeffreyN

Year: 1991 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5
September 24, 2018

Great Product

This is a great product. One note though. if installing on a 11-12 GT500 you will have to relocate the breather from the factory cover to the axle!

Nick

Year: 2012 Submodel: GT500

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

September 20, 2018

Ford Racing differential cover

Actually ordered the BandM cover first with large cooling fins on outside, but would not work because it hit the rear sway bar on my 2004 Saleen when I test fitted. American Muscle was excellent with the return and shipped this one instead, and it works perfect. No leaks at all using just the gasket with no sealant as the manufacturer recommends. I am very happy!

Robert64

Year: 2004 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

September 04, 2018

Outstanding Item

I had to replace my rear end pinion seal and took the chance to change out the gears and the differential cover. This item was well worth the money and makes it a lot easier to drain and fill the rear differential in the future. Would highly recommend this item.

JellyRollPA

Year: 2008 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

August 25, 2018

Nice!

I like the additional strength/piece of mind it adds to the rear end! Not to mention the good looks!

DavidS

Year: 2003 Submodel: GT

Helpful (6) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Shop Install

Installation Cost: 0-$100

August 09, 2018

Restoring

Sometimes it's the little thing you do..Excellent Product looks great

MauriceN

Year: 1989 Submodel: GT

Helpful (5) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5

Ford Performance Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 03-04 Cobra & 13-14 GT500)

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$184.99

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