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Ford Performance 4.10 Gears and Install Kit (86-09 V8)

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Market Price $319.99 You Save 19% ($60.00)
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$259.99 (kit)

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  • Item 100577

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    Features, Video & Details

    • Money Saving Combo Kit
    • Ford Racing 4.10 Gears - 8.8"
    • Motive 8.8" Rear End Installation and Bearing Kit
    • 1 Bottle of Ford Racing Friction Modifier
    • 2 Quarts of Royal Purple Max Gear 75w90 Gear Oil
    • Fits 1986-2009 V8 with 8.8" Solid Rear Axle

    Review & Installation Video

    Review & Install Video

    Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. This Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

    Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, 1 bottle of Friction Modifier, 2 bottles of 75w90 Gear Oil, gaskets, seals, shims, bearings and all the required hardware.

    Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.

    Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Speedometer Gear, a Ford Racing Speedometer Recalibration Tool or a Bama SF4/X4 Power Flash Tuner is a quick and easy way to fix this issue.

    Application. This Ford Racing 4.10 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 1986-2009 GT, Bullitt, Mach 1, Shelby GT500 and 1994-1998 SVT Cobra. It will

    not fit the 1999-2004 IRS equipped Cobra Mustangs.

    Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

    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 Details

    MPN# 100577

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

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    • (1) 3.8 fluid oz bottle of Friction Modifier
    • (2) one quart bottle of Royal Purple Max Gear 75w90 Gear Oil
    • Front & Rear Pinion Bearing
    • Pinion Seal
    • Carrier Bearings
    • Carrier Shims
    • Differential Bearings
    • Crush Sleeve
    • Pinion Nut
    • Cover Gasket
    • Ring Gear Bolts
    • Brush
    • Gear Marking Compound
    • Loctite
    Installation Info
    Will it fit my Mustang?
    • Bullitt - 01, 08, 09
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
    • Cobra R - 93, 95
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
    • GT500 - 07, 08, 09
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 86

      Customer Photos (19) Submit Your Photo

      View All 19 Photos

        Questions & Answers (41)

        5 Top Rated Questions

        Should I get the Traction-LOK rebuild?? I have a 2007 mustang GT automatic with only 20k miles on it.. Do you think I need the traction-LOK rebuild kit.. PLEASE HELP I don't know what to do !!!!

        • Yes go ahead and get it. It will upgrade it the cobra and gt500 specs. The carbon discs hold up way more. And since I'm sure you'll be getting nasty with those 4.10s I'd go ahead and upgrade. You'll have to reuse your clip spring though the kit comes with a cobra spring. But yes go ahead and spend a little extra!

        Helpful (6) Show 2 more answers

        Real quick question, ordering these gears for my 97 cobra. Which gear tooth exactly will I need to fix my speedometer?? 97 cobra stock t45

        • For your 97 Cobra with 4.10's you would either need a 23t speedo gear, or you would need a 6 tooth drive gear used in conjunction with a 20t speedo gear. We do not offer and recommend against the 23t speedo gear, as they have a tendency to wear prematurely not seen in the lower tooth count gears.

        Helpful (3)

        will i have to update my tune through bama whenever i install these new gears? i have a bama tune and am wondering if i will have to email them requesting a tune upon installation.

        • Yes - for those with 1999+ V8 Mustangs, you will want to let our Bama team know that you have upgraded your gear ratio. They can add that to your tune information, which will correct your speedometer reading. Hope this helps!

        Helpful (3) Show 1 more answer

        Do i really need the rebuilding loc kit? I have a 2001 ford Mustang gt convertible 5 speed with 97k miles I want to purchase the 4.10 install kit

        • The Ford Performance LOK kit is not required to do when swapping how gears, however, it would not be a bad idea to have everything changed to new when you are in and doing the gears.

        Helpful (2)

        can i use this oil ? car specifies 75-140

        • Use the oil that comes in the kit.

        Helpful (1) Show 1 more answer
        Post Your Question
        10 More Questions
        I'm getting my 4.10 gears installed from a 3.37 in a weak and I've heard that you loose a bit of power spinning the 4.10 gears. Is this true or is it nonsense?. 0 answer
        I have a 1989 mustang 5.0.Will the 4.10 gears hurt the stock automatic transmission? 1 answer
        Do I have to have a tune with these gears? 1 answer
        Will this kit work on my 28 spline? 1 answer
        I have the iTSX tuner, if I get the gear kit can I correct the speedometer myself ? All ready have a tune installed . Do I HAVE to get a new tune? 06 gt automatic 1 answer
        Do I need to buy the full rebuild kit if Im buying a brand new differential to install these for 1 answer
        Will this work with the stock clutch or do I need to get a upgrade 1 answer
        is anything else needed to change gears 1 answer
        I've had 2 quotes for this upgrade by local shops. 1 was for $2100.00 plus tax telling me I need to upgrade my carrier as well. the other was for $1200.00 plus tax both are way higher than the suggested cost. I own a 2007 Mustang GT 4.6L 3v that has a 3.31 rear with 8.8 axles why would the cost be so much higher than what you list on your site. 2nd question Dose this car ave a 28 or 31 spline? 1 answer
        Would this fit my 2014 mustang gt 1 answer

          Customer Reviews (100+) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$250-$500

          • Performance Gain 4.796748 4.8
          • Fit 4.894309 4.9



          • 4/5

            August 14, 2019

            Great

            Install went well. Gears make minimal noise deff best first mod for your money woke my 97 cobra up big time.

            Bradysvt6

            Year: 1997 Submodel: Cobra

            Helpful (0)

          • 5/5

            Installation Time: Full Day

            May 29, 2019

            Sick

            I literally pop wheelies everywhere I go. Just slam the gas in first gear and off you go.

            EdgarM

            Year: 2006 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            May 12, 2019

            Good gear set up

            I really love them thank y’all so much I support y’all all the way good people

            ShawnC

            Year: 1996 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            May 07, 2019

            04 gt geared up automatic

            very nice kit. took out the 3.27s and had the 4.10s installed. low end acceleration is 2 thumbs up. the car comes up on the powerband a lot faster. I used my sct tuner to calibrate the speedo. On the highway in overdrive the car does well. the flowmaster exhaust is screaming a lil bit from the higher rpm from the gear ratio. I love it

            JerryK

            Year: 2004 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            May 02, 2019

            Super cheap

            Perfect fitment. The only thing I did not like was the bolts that came with for the ring gear. They had a little bit of play sitting in there so I bought oem bolts. But other then that great product for the price!

            DerekK

            Year: 2001 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Weekend

            April 28, 2019

            4.10 gears install kit

            Is a great affordable kit will help you to get the most performance out of your car

            Alonso

            Year: 1992 Submodel: GT

            Helpful (2)

          • 5/5

            April 28, 2019

            4.10 gears

            Havent had a chance to install them but look amazing and ready to feel th power

            Steven

            Year: 2004 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Full Day

            March 25, 2019

            410 Gears And Install Kit

            Awesome kit, ame with everything you need to install your 410 gears. Well worth he money. Tks American Muscle.

            Delton

            Year: 2005 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            January 09, 2019

            Power!

            This set up added a ton of torque to my mustang! I feel bad for my tires now, easy to burn a set up!

            Timmay

            Year: 2007 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Full Day

            January 06, 2019

            Best Mustang Modification

            Went from stock 3.27’s to 4.10’s in an 03 GT with a 5 speed. I drive 90 miles round trip for work daily at 70 mph and love it. Makes the car way more fun to drive. If you do the install yourself be sure to support the car by the frame to let the axle drop as low possible to make it easier to install the pinion bearing races. Have a torch handy in case you need to heat the old bearings up to drive the old pinion out.

            DannyS

            Year: 2003 Submodel: GT

            Helpful (10)

          • 4/5

            Installation Time: Afternoon

            December 10, 2018

            Good quality gears

            gears are probably the best upgrade you can give your car on a budget, unless you have money to get forced induction. More often than not you probably won't be using the high end of your car unless you want to drive around going 150mph so enjoy that low end rip and get the gears. The Ford racing gears seem like they are good quality.

            Enthusiast

            Year: 2004 Submodel: Mach 1

            Helpful (8)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            November 28, 2018

            Happy Stang!

            Very happy with my new gear swap just what my mustang needed thank you American Muscle!

            CharlesG

            Year: 2007 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            November 22, 2018

            New 4 10s

            Just had the 4 10 gear installed all I can say is WOW

            TerryL

            Year: 2008 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            November 21, 2018

            Awesome gains

            This gear kit is really well worth the money. Comes with everything you need. I took it to my local shop. They charged me $350 for the install but its so worth it knowing it was done right. No gear noise at all. Night and day difference from 3.27 to 4.10. My cars an automatic so it helps a lot. Ordered a Bama tuner yesterday, waiting on that to get here to fix my speedometer and tune my car. Can't wait!

            RobertO

            Year: 2000 Submodel: GT

            Helpful (13)

          • 5/5

            Installation Time: Afternoon

            November 19, 2018

            Good start

            Ford Performance is the main Ring and pinion set we Order ford Ford cars and Trucks in our Shop. good quality .the kit give gives you everything, but axle bearing and seals.

            Flipper

            Year: 1992 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Full Day

            October 31, 2018

            Don't fear the Gear!!

            This should be one of the fisrt mods done on any car. My Pony has being awaked!. Totally different car. In conjuntion with a 3000 stall converter snaps on every shift.. And without OD, its another experience. Love driving my car.

            DennisD

            Year: 2006 Submodel: GT

            Helpful (12)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            October 30, 2018

            Whole new car!

            4.10 gears made my 00 Mustang GT feel like a completely different car. 10/10 mod everyone needs.

            BrandonH

            Year: 2000 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Full Day

            October 28, 2018

            Great product

            Must include this in your new gear install excellent priced as a kit with the gears I bought and why not replace all you bearing when it already apart easy dessision to make. High quality parts at a great price

            JonD

            Year: 2002 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            October 25, 2018

            great for around town driver

            if your looking for more butt dyno power these will do the job. be warned that highway rpms are really high and if you daily 70mph plus wih a manual trans you may be unhappy with how high it has to be in the rpm range.

            ChristopherW

            Year: 2009 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            August 24, 2018

            4.10

            Do not fear the gear!! Were I live highway speed limits are 55 to 70mph.... But when you punch the pedal it's a game changer... It made my stock 97gt with the pi swap and cams and some mild bolt on and it will wake it up... I recently put a serious quick whooping 0n a 2010 rt challenger from a dig.. They make 450hp stock.. So thats night and day for you... You will be in love... Now I'm going boosted so I might be going 6speed but till then I'm in love with the 4.10

            BobbyB

            Year: 1997 Submodel: GT

            Helpful (13)

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