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Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (10-14 GT)

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  • Item 24001G11

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    Features & Details

    • Ford Racing Quality
    • Strong Forged Construction
    • 3.73 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 2010-2014 GT and 2010-2014 GT500 Mustangs
    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. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

    Superior Quality. These Ford Racing 3.73 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

    Application. This Ford Racing Ring and Pinion Gear set will fit 11-14 Mustang GTs and 11-12 Shelby GT500s. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

    Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

    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: 2010 2011 2012 2013 2014 Details

    MPN# M-4209-88373

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

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    Installation Info
    Tech Specs

    Approximate RPM for 2011+ GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4210 5894        
    2 2795 3913 5031 6149    
    3 1944 2722 3499 4277 5054 5832
    4 1518 2126 2733 3340 3948 4555
    5 1150 1610 2070 2531 2991 3451
    6 748 1047 1346 1645 1944 2243

    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4798 6717        
    2 2692 3768 4845 5922 6998  
    3 1750 2449 3149 3849 4549 5249
    4 1315 1841 2367 2892 3418 3944
    5 997 1396 1795 2194 2593 2992
    6 795 1113 1431 1749 2067 2384
    Will it fit my Mustang?

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        Questions & Answers (20)

        5 Top Rated Questions

        I have a 2014 V6 base with 2.97 gears. Do I need to change the limited slip carrier to install these Ford 3.73 gears? What is needed to do the install?

        • You would not need to change the differential when going from the stock 2.97's to a Ford Performance Ring Gear and Pinion Kit on your 2014 V6.

        Helpful (2)

        Do they whine or howl? Please don't tell me that it's all in the install. That's not always true. If you have howling or a whine, I'd like to hear about it.

        • Just had the 3.73 gears professionally installed on my 2012 GT w/automatic. No howling or whine...None!

        Helpful (2) Show 1 more answer

        What add-ons are necessary to buy along with the gears if they are going to be professionally installed?

        • Hello! The Motive Rear End Installation and Bearing Kit has everything you need to install the Ford Performance 3.73 Gears Motive Rear End Installation and Bearing Kit - 8.8 in http://www.americanmuscle.com/rearendrebuild.html

        Helpful (1)

        Can a car pass CA smog with this kit installed? Will there be any issues with smog if the speedometer is inaccurate? Any issues with smog if there is a tune to correct the speedometer?

        • It can honestly depend on the state and their laws as it can vary. We recommend checking with your state ordinances or a local shop.

        Helpful (0)

        Would I need a re-tune right after installation?

        • It is recommended to update your vehicles tune after installing different gears.

        Helpful (0)
        Post Your Question
        10 More Questions
        Can these be used for s550 mustangs gt 2016 because i have a new set of these that i never installed on my 13 GT mustang. 1 answer
        Correction: What is the difference between this part number and # M-4209-88373 listed on the Ford Performance web site for the 11-14 Mustang? 1 answer
        I am looking at replacing the stock gearing on my 2012 V6 Mustang and am trying to figure out which size would be best. Best being a good amount of performance add without killing gas mileage too badly. I've heard the 3.73 is the most popular but is that "best" for V6's or just GT's? I use my stang for mostly highway speed commuting and looking forward to some track days. 1 answer
        Will you please explain what the different gear ratios mean for performance in my 2011 GT with 3.73 gear ratio. 1 answer
        I inquired at a Ford dealership about having these 3.73s installed in a 2014 Mustang GT that has a factory 3.31 ratio. In addition to a substantial bill for labor, I was advised that I could only upgrade to the 3.55s. Can anyone lend any insight on this. I assumed that 3.73s would fit into the same housing as the 3.31s. Maybe it's a warranty issue? 1 answer
        I put 3.73 in my 2014 mustang gt automatic and they whine like crazy when I let off the gas. They whine a little under acceleration but very little.We tried all kinds of different shim on the pinion and the ring also. Gears feel tight when turn the ring gear by hand but there is slack on the pinion. A friend of mine had this issue and replaced 3.73 with 3.55 and the noise went away..any idea? 1 answer
        Ok so I bought 3.73s for my 03 Mach 1 and ended up selling the mach. Can I install those gears on my 13 Gt??? 1 answer
        If I put this gear ratio in an otherwise stock 2010 Mustang GT Premium, what would be the top speed change? The 0-60, 0-100 time changes? 1 answer
        my 2013 GT with 3.31's has about 36K on them, I want to switch out to the 3.73's do I want just the gears or the whole rebuild kit? thanks in advance! 1 answer
        Does the increased rpms when going from 3.31 to 3.73 on a highway daily driver have significant increase on engine wear and tear? Speed limit 75mph. 1 answer

          Customer Reviews (64) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$250-$500

          • Performance Gain 4.666667 4.7
          • Fit 4.925926 4.9



          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            May 28, 2019

            3.73

            Just put in really don’t fell much difference over stock but seems to be good

            11gt50dan

            Year: 2011 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $500-$1000

            January 21, 2019

            Go for it

            Gears installed by local gear shop. Can tell a difference in power. Have not gotten on it yet due to break in period. Increase in highway rpm. Nothing I can't live with actually starting to get use to it. Great mode.

            LondellR

            Year: 2012 Submodel: GT

            Helpful (2)

          • 5/5

            November 12, 2018

            Great Mod!

            I was planning on upgrading my 3.15 gears to 3.73 after winter in the summer. However, my car had other plans. I developed some whining and issues with the rear. Instead of fixing the issue which would have been way cheaper. I decided since I am going to open it up I might as well upgrade. I have a few things to mentions if you are doing it yourself. This job is indeed a very messy job and requires a lot of work. We had done it on jacks, but I recommend finding a shop that can do it for a fair price. It is truly not worth doing it yourself. Also, you will need many specialty tools. Many of which you have to rent and some I had to purchase. Even with the right tools, there is still a lot you have to improvise yourself. Another mention is that you will need to buy a third bottle since you need to lube up the bearings as well as fill up the differential. When it comes to performance the car pulls very hard specifically if you have a tune on the car. I was quite surprised how the car had improved. I would recommend this mod hands down, but you really have to decide if you want to install it yourself.

            LukaszF

            Year: 2013 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Full Day

            September 13, 2018

            3.73

            Car pulls way harder then the stock 3.15 i would recommend these if your tryna get a faster 1/4mile time

            IvoryG

            Year: 2014 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Full Day

            January 29, 2018

            rear end gear is a must!!

            I had the 3.73 gear changed at the ford dealership that does ford performance upgrades great job done and then they could not calibrate the speedometer cause if they do it the computer locks you out so its a tune it needs to get the right calibration so I bought the SCT tuner and between both its omg this car pulls hard very aggressive I have and automatic and that gear is perfect even on the highway right at 2500 RPMs for 80mph well worth it the 3.15 gear sucked now the car can burn rubber so far I did it a few times and dropped my time .5 sec 0-60 and the car has more that was a 4.5 but ill get better at it and will drop the time more it has the neck snap your looking for and its not over bearing its easy to drive and powerful

            DennisI

            Year: 2013 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Full Day

            January 02, 2018

            FORD RACING ring and pinion

            GREAT ITEM WORKS AND FIT PERFECT, NOT TO MAUCH ADJUSTMENT LIKE OTHER BRANDS

            GUSHER

            Year: 2014 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Full Day

            November 27, 2017

            Impressive!

            Not too much like 4.10's but just right for a daily.

            Frosty

            Year: 2010 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Afternoon

            June 10, 2017

            Upgrade

            I went from 3.31s to these and the car feels so much more responsive. 0-60 is quicker as well as the low end power.

            RogerSVT

            Year: 2013 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            January 26, 2017

            OE Quality

            Can't beat OEM for fit, finish, and quality. Set up went smooth, gears are quiet and perform as expected. And for $150, why go with any other brand for your Mustang?

            Grayday2015

            Year: 2011 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Full Day

            October 20, 2016

            2012 GT

            The 373 really woke my GT up excellent mod should be the first mod really compliments on my other modifications

            ko103

            Year: 2012 Submodel: GT

            Helpful (7)

          • 5/5

            August 08, 2016

            Great Pulling Power

            Smooth ride and great pull performance. Worth the price to upgrade stock to power.

            Kathy66

            Year: 2014 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Weekend

            January 24, 2016

            3.73's Are Great

            The 3.73 gears are one of the best mods I have ever done. I had 3.15's on my 2012 GT before and this completely awakens the beast. I plan on adding a CAI and Tune, plus maybe an aluminum drive shaft and better suspension. Don't forget to correct your speedometer after the install!

            Jugerknot101

            Year: 2012 Submodel: GT Pleasanton, TX

            Helpful (7)

          • 5/5

            Installation Time: Full Day

            June 24, 2015

            Worth every penny

            I have a 2013 Mustang GT it had 3:31 gears, I installed the boss 302 intake and 90 mm Ford racing Throttlebody and I could see that I needed to put a little back in the bottom end so I installed the 3:73 gears, what an amazing difference in my car, I had a local speed shop do my install the guy said everything went perfect, cost was about 275.00 , I love the performance and just driving it is a blast. I would consider this to be a got to have it mod !!

            blackwidow43

            Year: 2013 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            March 10, 2015

            Streetable Drag gears

            Bought these gears for my 2012 Mustang GT for the upcoming drag racing season. Running in combination with 6spd auto and 275/40R18 street radials. Seems to have a lot more pick up on the lower end and midrange to top end seems great as well. Still averaging 24.5 mpg on freeway and 17.9 mpg city

            BowTieSpanker

            Year: 2012 Submodel: GT Ontario, OR

            Helpful (6)

          • 5/5

            Installation Time: Full Day

            February 24, 2015

            Made a huge difference!

            I went from 3.31 gears to 3.73 and they made a huge difference. It definitely puts me back in my seat. Worth every penny!

            SHARP

            Year: 2010 Submodel: GT LUBBOCK, TX

            Helpful (7)

          • 5/5

            Installation Time: Full Day

            August 01, 2014

            Best Bang for you Buck!!

            I ordered these 3.73 Gears for my 10 GT Premium. I have FRPP Hotrod Cams, an Airaid CAI, Custom 3'' Exhaust and a iTSX Bama Performance Tune. My GT is an automatic (adjusted shift points) and these 3.73 gears really woke her up!! The torque is soooo much better then before. I had Royal Purple Max Gear oil added when the gears where replaced and the shifts are way smoother!!. Honestly these are probably the biggest difference maker and best bang for your buck out of all the "normal" bolt on upgrades you can have done. It just feels like a completely different car!! I had a local performance shop that specializes in Mustangs do the install and they charged 225.00 for the install (10% off for military) and 73.00 for the required pinion bearing race kit. Overall cost was $301.36. The install perfect and without a hitch, absolutely NO winding. NOTE: A tune is REQUIRED to be loaded before you can even test the car after install. Bama Performance had my custom tune emailed out within 2 days of purchase and the load with my iTSX tuner was super easy. AM had my gears mailed out next day. I can't say enough about AM...By far the BEST Mustang Performance company in the world!! ALL my upgrades have been purchased through AM and I've never had an issue with anything I've bought....Buy these gears if you looking for the best bolt on upgrade you can buy for under 500 bucks total!!

            MustangGT10

            Year: 2010 Submodel: GT Athens, GA, USA

            Helpful (7)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            June 17, 2014

            GREAT MOD

            I could feel the difference in these gears right away. The car feels a lot more sporty. Takes much less effort to speed up and go around someone on the road without having to punch the gas. I've probably felt more of a difference with this mod than any other I've done so far. I would definitely recommend these gears.

            KB13

            Year: 2014 Submodel: GT

            Helpful (7)

          • 4/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            November 15, 2013

            DO YOUR HOMEWORK

            Do your homework on rear gears, I personally have a 2010 GT Manual.. because of this, I have 3.55s stock, I thought that I had 3.31s; so my gear change was very minimal and I kind of wish I hadn't feared the gear and went for 4.10s Gears are great though, No whine or any noise and they make shifting slightly smoother. Keep in mind the install is not very cheap, and very hard to do at home, roughly 80 n hour shop fee for a "4 hour" job... I do recommend them though, Good Luck!

            Zachjones

            Year: 2010 Submodel: GT Daytona, fl

            Helpful (8)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            August 02, 2013

            Seat of your pants feel even at freeway speeds

            I had a shop in AZ install these Parts and Labor for $580 out the door. I tell you at first I didn't notice much difference. But when I calibrated the Speedo the whole experience changed I could now feel the difference in response with comparison in real-time Speedometer reading. Great bang for your dollar. Also using All FRPP parts ensures OE quality.

            Thundermetal

            Year: 2012 Submodel: GT Tempe, AZ, USA

            Helpful (6)

          • 4/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            July 01, 2013

            Acceleration you can feel!

            Had a problem with the first set of gears, they were cut in a way that they were noisy even install to the exact specs from FRPP. AM got me a replacement set out and all is well now. If you have never installed gears before do yourself (and your wallet) a favor and get them installed professionally! Specifically somewhere that knows how to install Ford gears without a whine and stand by their install if they do. I lost a couple mpg on the highway but the gains are pretty nice, especially with the Hurst short-throw shifter.

            Chris2010GT

            Year: 2010 Submodel: GT Bentonville, AR, USA

            Helpful (8)

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