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

Item 24001G11
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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

      Ford Performance M-4209-88373

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring gear
      • (1) Pinion gear

      Tech Specs

      Approximate RPM for 2011+ GT

      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

      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

      Customer Reviews (64)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 64 customers

      Installation Time: Weekend

      Installation Cost: $250-$500

      • May 28, 2019

        5 2011 GT - 11gt50dan Installation Time: Shop Install Installation Cost: $250-$500


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

        Helpful (0)
      • January 21, 2019

        5 2012 GT - LondellR Installation Time: Shop Install Installation Cost: $500-$1000

        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.

        Helpful (2)
      • November 12, 2018

        5 2013 GT - LukaszF

        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.

        Helpful (3)
      • September 13, 2018

        5 2014 GT - IvoryG Installation Time: Full Day


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

        Helpful (3)
      • January 29, 2018

        5 2013 GT - DennisI Installation Time: Full Day

        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

        Helpful (8)
      • January 02, 2018

        5 2014 GT - GUSHER Installation Time: Full Day

        FORD RACING ring and pinion


        Helpful (6)
      • November 27, 2017

        5 2010 GT - Frosty Installation Time: Full Day


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

        Helpful (6)
      • June 10, 2017

        5 2013 GT - RogerSVT Installation Time: Afternoon


        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.

        Helpful (6)
      • January 26, 2017

        5 2011 GT - Grayday2015 Installation Time: Afternoon

        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?

        Helpful (5)
      • October 20, 2016

        5 2012 GT - ko103 Installation Time: Full Day

        2012 GT

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

        Helpful (7)

      Questions & Answers (20 answers)

      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

      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)
      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

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • GT - 10, 11, 12, 13, 14

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