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

Market Price $179.99 You Save 8% ($15.00)
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  • Item 24001G11
  • MPN# M-4209-88373

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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

    CA Residents: Warning: California's Proposition 65

    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 (17)

    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)

    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?

    • This Ford Performance Ring Gear and Pinion Kit is just the ring and pinion gears, where as that M-4209-88373, which corresponds to our item number 24001 comes with the crush sleeve, pinion nut, and shims. It also can be found here, https://www.americanmuscle.com/fopege3ra1.html.

    Helpful (0)

    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.

    • 3.73 gears. such as the Ford Performance 3.73 Gears are a common reccomendation, as they give a good blend of the acceleration of 4.10's and the fuel mileage and and lower highway cruise RPM of 3.55's. For a daily driver that see's a lot of highway use, a 3.73 would be perfect.

    Helpful (0)
    Post Your Question
    10 More Questions
    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
    What is included in the install kit? If I'll get the gears installed professionally, do I only need to order the Gears and the 8.8 bearing? 1 answer
    Differential cover? I had these gears installed a few weeks ago, and i love them! i was just wondering if its necessary to replace the differential cover when installing new gears? should i replace it when im changing out the fluid after 500 miles? Anyone run new gears without an aftermarket cover for a long period of time? Thanks in advance 2 answers
    Highway mpg diff between 3.55 and 3.73 in 10' gt manual. i do a lot of highway driving and want to upgrade my gears. I would like to put the 3.73. But if the mpg is a big difference between them and the 3.55. then i may have to go with the 3.55 3 answers

    People Who Bought This Item Also Bought

    Customer Reviews (61) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.75 4.8
    • Fit 4.916667 4.9



    • 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 (0)

    • 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 (5)

    • 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 (4)

    • 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 (3)

    • 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 (4)

    • 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 (3)

    • 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 (5)

    • 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 (3)

    • 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 (5)

    • 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 (4)

    • 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 (3)

    • 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 (5)

    • 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 (5)

    • 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 (3)

    • 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 (6)

    • 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 (3)

    • 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 (6)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 16, 2013

      Extra Grunt

      Huge difference in low end grunt and acceleration from these babies. Highly recommend these or 4.10's if your running stock gears.

      Bigjamesdean

      Year: 2010 Submodel: GT Nashville, TN, USA

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      April 23, 2013

      Now I feel the car is awake

      So my 2013 GT GB Premium came with the bone stock 3.31 LS Gear ratio of 3.31. Tis ok for hwy, fuel economy driving, but fuel economy and MUSTANG should not be in the same sentence. So one of the first mods I did was yank the 3.31s and ordered these beasts. No the experienced modders will tell ya 4.10s are the way to go, but if you're not use to a car with a lot of grab and hook up, it is best to go from 3.31s to 3.73s. If you want to save some money on gas you could go for 3.55s, respectable gear, but for those of us who want to unleash the beast under the hood... Well, the 3.73 is a great gear for the track and just normal day to day driving. Gear install is about a day, even for the hard core mechanic. It is FORD PART some Ford Racing warranties the item. If you have a new car like I do the rebuild kit is not needed, but if you're doing the switch on a car with 40k+ on the odometer get the rebuild kit and use it. With these gears and a BAMA Performance tune you will feel like you are in a brand new car. Make sure you do use Friction modifier when mixing in the Gear Oil. Also of note, you will need at tuner to reset the axle ratio in the vehicle. No more little speedo gears to change it is all based on a tune. Worth every penny. Cost os parts and install will run you about $600.00 (the $200-$300 price AM feels it should cost must be someone charging $50 labor. Figure the install to be between $375 and $475.

      TheMasterofFunkness

      Year: 2013 Submodel: GT Philly

      Helpful (14)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      April 14, 2013

      They Help

      They aren't bad def. Make a differance on 60foot times. I was hoping for a little more oomph from them but, again there are noticeable gains. The car doesn't seem to struggle as much off the line and climbs through the gears faster. I lost 5mpgs on the highway but gained about 3 in the city, now I get about 21mpg be it highway or city driving.would I recommend yes, if just for the track 4.10s if u daily drive I would say no lower than these to keep some effeciancy.

      2010rustang

      Year: 2010 Submodel: GT TEXAS USA

      Helpful (5)

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