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Ford GT500 Finned Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 99-04 Cobra)

Market Price $175.99 You Save 16% ($29.00)
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$146.99 (each)

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  • Item 387091

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    Features & Details

    • Original Equipment on 2013 Shelby GT500 with Track Pack
    • Finned Design
    • Dissipates Heat - Increases Gear Life
    • Increases Rear End Rigidity
    • Light-Weight Cast Aluminum Construction
    • Fittings for Differential Cooler Pickup and Return Lines
    • Cover Machined for Temperature Sensor with M10 X 1.6-6h Threads
    • Genuine Ford OEM Part - DR3Z4033B
    • Fits 1986-2014 8.8" Solid Axle Equipped Mustangs
    GT500 Original Equipment. This Ford Finned Differential Cover is the same exact one found as original equipment on the 2013 Shelby GT500 with the Track Pack option. Designed with cooling fins to reduce overall gear oil temperature to improve gear and bearing life, this Differential Cover features fittings for differential cooler pickup and return lines, as well as an oil temperature sensor.

    Finned Aluminum Reduces Heat. Constructed from light-weight cast aluminum the Ford Mustang 8.8" Differential Cover features a finned design that dissipates heat much faster than the stock unit to prolong the life of your ring and pinion gears.

    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 Finned Ford Differential Cover is designed to fit the 1986-2014 Mustangs equipped with the 8.8" solid axle rear end, including the 2011-2014 V6, 1986-2014 GT, Bullitt, Mach 1, BOSS, Shelby GT500 and 1993-1998 SVT Cobra. It will not fit 1999-2004 Independent Rear Suspension (IRS) equipped SVT Cobras.

    Technical Note. The Installation of the Differential Cover may require longer bolts as the factory bolts may be to short.

    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

    MPN# DR3Z4033B

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Axle Differential Cover
    • (1) Fill Plug
    • (1) Drain plug
    Installation Info
    Tech Specs
    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, 13, 14
    • 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 only. Does not fit 1999-2004 IRS equipped Cobras

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    Questions & Answers (13)

    5 Top Rated Questions

    Has anyone installed this on a stock 2011 Mustang GT with 8.8 rear end? Will it fit? # DR3Z4033B

    • The Ford GT500 Finned Differential Cover will fit a 2011 GT

    Helpful (1)

    Since it has a breather/vent on the differential can we plug the vent on the left side of the axle.

    What are the torque specs for the cover bolts? I assume they may be different than a stock steel cover.

    • Stock differential cover bolt torque should be used.

    Helpful (0)

    how long do the bolts need to be? the factory ones are too short

    • We sell an upgraded differential hardwarekit. I will link it here for you.

    Helpful (0)

    Will this cover clear a 3.73 gear?

    • Yes, this differential cover will work with 3.73 gears.

    Helpful (0)
    Post Your Question
    8 More Questions
    When filling rear end do you still use the fill level plug on the front of the diff. (by drive shaft) to calculate the proper amount of fluid? 1 answer
    Will this clear BMRs Adjustable Panhard Bar? 1 answer
    Do this cover came with a gasket and hardware to install it? 1 answer
    I have a 99 F150 with the 8.8in rear end. Will this for my differential? 1 answer
    Do you use RTV or will I need to order a gasket? 1 answer
    After installing this will it still take the same amount of fluid or will I need more? How much fluid should I need 1 answer
    can this be painted? 1 answer
    Can these be painted? or at least clear coated? 1 answer

    Recommended For You

    Customer Reviews (11) Write a Review

    Overall Rating 4.4

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Performance Gain 3.666667 3.7
    • Fit 4.666667 4.7

    • 5/5

      February 27, 2019

      Great look

      Good quality item haven't put on yet. Looking forward to installing. Hopeing it will help in diff running cooler.


      Year: 2014 Submodel: V6

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      January 19, 2019

      Solid Ford OEM Quality Part.

      My car originally came with the same cover minus the the drain/fill holes which is no bueno, so I waited to buy this one until I needed to change the diff fluid. After install, I used a hand suction pump and hose to fill the rear diff because the fill hole is inaccessible using just the bottle that the gear oil is in. Install was fairly simple except you will need to lower the panhard bar. It is in the way. Luckily my panhard bar is adjustable because the rear end shifted when I disconnected it. So I had to spend extra install time to get the rear centered again. Maybe putting jackstands on the rear axle might prevent it from shifting?


      Year: 2012 Submodel: GT500

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 08, 2017

      fits like oem

      fits and looks great, make sure to find the correct hardware.


      Year: 2011 Submodel: GT

      Helpful (4)

    • 5/5

      October 13, 2017

      Looks great

      Simple. Inexpensive. Don’t think twice about buying


      Year: 2006 Submodel: GT

      Helpful (4)

    • 4/5

      Installation Time: Less than 1 Hour

      June 20, 2017

      Awesome but needs some modifications

      I bought this piece however it did not come with the screws needed to install. I ended up goomg to autozone to get the nessary equipment. Looks great and thinking of gettong a cooler


      Year: 1996 Submodel: GT

      Helpful (4)

    • 4/5

      Installation Time: Less than 1 Hour

      June 16, 2017

      Unit itself is great, needs new hardware

      I didn't realize when I purchased but when while installing the cover, the factory bolts wouldn't reach far enough. Be sure to purchase longer bolts before you install.


      Year: 2003 Submodel: Mach 1

      Helpful (4)

    • 2/5

      Installation Time: Less than 1 Hour

      May 29, 2017


      The cover is great. How ever the customer service was awful. All the lady did was make excuses. When asked for supervisor put me on hold to come back and argued. Asked for sup again placed on hold. All she did was make excuses and lie. 1 the spec,s your website states for the plug thread is wrong. Its a 11m fine thread or 7/16 fine thread. This was discovered after I had already went to 3 hardware stores and 2 fastner speciality shops and the Ford dealership. AM charges 146 for this part no plug supplied the Ford dealership charges 90 bucks for same part with plug supplied. I took the one from AM in the box to Ford . They brought the same one in the same box all part numbers the same made in same place supplied by same buyer opened it ford me and there was the plug. So cover is great. AM customer service horrible. I have spent alot of money with AM the past year. Not sure I will buy agan from AM anytime soon..... Anyway I hope the correct thread size will help you guys so you don't have the same experince I did.


      Year: 2000 Submodel: V6

      Helpful (11)

    • 5/5

      September 16, 2016

      Good Cover - Make sure you Order the Right One!

      The cover is great and fitment is tight with an aftermarket panhard bar (about 0.5" clearance). MAKE SURE YOU ORDER THE RIGHT ONE. AM has a couple cersions of this and one of them is the COVER ONLY! NO HARDWARE came with it so it won't go on because the factory bolts on the factory GT cover are too short. You will also be missing the vent plug. The bolts are UNOBTAINIUM! If you find them at a dealer, they want $16/bolt for 10 bolts so the bolts locally cost more than the cover


      Year: 2012 Submodel: GT

      Helpful (6)

    • 3/5

      September 12, 2016

      watch out for installation issue

      awesome cover. looks like it will do the job keeping the diff cool and the drain/fill plugs make servicing a breeze. would have gave this item more stars if it wasnt for the failure to mention 1) panhard bar needed to be removed for clearance to install, 2) the stock bolts can be used but will only hold the diff on with 1-1/2 threads so make sure u get longer bolts, and 3) comes with a sweet block plate for he temp sensor on top you probably wont use, but the block plate doesnt fully cover the hole so there is a good chance fiff fluid can exit through the hole. they should have shipped it with a cap or bolt threaded in since most people wont have a temp sensor to thread in there. other than a few things to be cautious about and WERE NOT MENTIONED IN PRODUCT DETAILS OR ANY OF THE OTHER REVIEWS, its a solid diff cover.


      Year: 2005 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      May 04, 2016

      Bolt-on Cool

      This is a nice piece to help keep your rear axle gears cool for longer bearing and axle life - like it a lot since we take our Mustang out on long road trips. Added this at the same time as gears, so install was not timed... but easy to install since only ten bolts and gives you a fill plug. Unit is vented, so you may want to plug the vent in this cover or plug the vent in the axle (as you need only one of them open). You will need longer bolts and a gasket (though silicone can be used and many say lasts longer). Looks great from behind, letting people know there is more to your car than they may have thought...


      Year: 2010 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      April 25, 2016

      Fairly inexpensive insurance.

      I've purchased two of these.... The first, I got from Ford Racing, and the second, I got here, at American Muscle... for $80.00 LESS! It's made very well, and is WAY more substantial than the cheap, stock stamped steel cover. The fins DO keep the differential cooler - at higher speeds. The BEST thing about this cover, for people who like to MAINTAIN their rides... With its two plugs, it makes for VERY easy gear oil changes! ~ Carmine


      Year: 1986 Submodel: GT

      Helpful (6)

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