WIN $5,000 For Your Mustang! Enter Now
Talk to a Mustang Expert
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

Ford Performance 3.73 Gears (11-14 V6)

Market Price $173.99 You Save 17% ($29.01)
Our Price


FREE Shipping
  • Item 24001G116
  • MPN# M-4209-F373N

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Ford Racing Quality
  • Strong Forged Construction
  • 3.73 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 2011-2014 V6 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 all 2011-2014 V6 Mustangs. 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: 2011 2012 2013 2014 Details

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

Approximate RPM for 2011+ V6

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
Will it fit my Mustang?
  • V6 - 11, 12, 13, 14

Most Helpful Reviews

OMG!!!! :D

I didnt think going from 327 to 3.73 would make a big difference.boy was i wrong .A must for a first mod to any mustang.YOU will get planted firm into your seat in 1st and 2nd and 3rd. my fav is 2nd gear ...

Read More
Helpful (2)

They are awesome!

Since ive gotten these gears on my v6 automatic its opened the car up. I can now do burnouts unlike before given because of the lower end power these gears give you. Gas mileage isnt anything to worry ...

Read More
Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 71 Reviews

Customer Photos

You Might Also Like

18 Questions / 8 Answers

Ask a Question

I plan on adding 3.73 gears on my 2011 V6, and a procharger, n upgrading some interals. Do i need to upgrade my drive shaft?


  • Since all these upgrades will give you a nice increase in power, it would be a good idea to upgrade to a one piece aluminum driveshaft. A one piece driveshaft will be able to handle the increase in horsepower unlike the stock two piece. Also, I recommend getting a driveshaft safety loop which will catch the driveshaft if anything fails.


    Helpful (0)

Well I read through most the questions and I didn't find a *Solid* answer. 1. To have these 3.73's installed in my 2011 V6 do I *need* both the "Installation and Bearing Kit" and the "Add 8.8in Rear Gear Pinion Bearing" or is that redundant? 2. "Add Traction-LOK Rebuild Kit w/ Carbon Discs" is this needed on Automatics? And more importantly is this needed for V6 Mustangs? The description seems to be talking about how it helps with more Torque but us V6 owners typically don't see above 400 HP/TQ so why would I need to spend the cash on this? More importantly is Question #1 though, thank you so much! I'll purchase once I get a response! Thanks!!


  • 1. You will just need the Installation and Bearing Kit Item #21201 ( 2. The Ford Performance Traction - LOK Rebuild Kit w/ Carbon Discs - 8.8 in. is not NEEDED but just a recommendation that while you are taking apart your rear end you might as well replace those old worn out discs with these stronger and better performing Carbon discs.


    Helpful (0)

would I have to get the one piece drive shaft if I got this gears and was planning on taking my car to the track?


  • You will not need to get a one piece driveshaft when you install the Ford Performance 3.73 Gears (11-14 V6), however if you want to drop more weight and want to get quicker response time I suggest the The Driveshaft Shop Aluminum One Piece Driveshaft (11-14 V6) item #14106 (


    Helpful (0)

2012 V6 with just over 19k miles on the car. Is it at all necessary to purchase any of the rebuild kits or would I be fine w/just gears?


  • We highly recommend the rebuild kits for any and all gear swaps. Reason being, new shims and bearings will help your new ring and pinion to perform flawlessly and will prolong the life of your new gears. Not to mention, it's relatively cheap insurance against any future issues for costly tear downs & rebuilds. Hope this helps!


    Helpful (0)

Show 1 more answer

I have a 2009 V6 automatic mustang which I just purchased a brand new 2013 rear end with an aluminum drive shaft and under drive pulley for. How will 3.73 gears affect my top speed vs. 4.10 gears?


  • A 4.10 is definitely going to have a more diminished top speed because a 4.10 will allow you to reach the top end of each gear quicker than a 3.73. If you ever plan on driving on the highway, the Ford Performance 3.73 Gears (11-14 V6) would be perfect for you. Going to a 4.10 you may find that you are close to red-lining in your top gear while driving down the highway. However if this is for a drag or racing application, a 4.10 would be perfect.


    Helpful (0)

Answer This Question

Install kit, trac-LOK, and 8.8 rear gear pinion bearing? If I get the install and bearing kit, will I also need to get the 8.8in Rear Gear Pinion Bearing? Or is that redundant? Also how do I know if I need to get the Trac-LOK kit?


  • I installed the same kit in my 2013 V-6 and the performance increase was noticeable. I would keep the TRAC-LOC kit, I didn't need the Rear Gear Pinion bearing. You'll also have to get a tuning kit to correct your speedo other wise you'll be showing 10 - 12 mph faster. Fred


    Helpful (0)

Show 1 more answer Answer This Question

More Products You Might Like

Customer Reviews (71) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

  • Performance Gain 5 5
  • Fit 4.944445 4.9

  • 5/5

    July 10, 2016

    They are awesome!

    Since ive gotten these gears on my v6 automatic its opened the car up. I can now do burnouts unlike before given because of the lower end power these gears give you. Gas mileage isnt anything to worry about i havent seen a major decrease worth worrying about. If your looking into these id go for it. Installation cost me $415 also cause i had a bad bearing of some sort.


    Year: 2014 Submodel: V6

    Helpful (1)

  • 5/5

    November 05, 2009

    OMG!!!! :D

    I didnt think going from 327 to 3.73 would make a big difference.boy was i wrong .A must for a first mod to any mustang.YOU will get planted firm into your seat in 1st and 2nd and 3rd. my fav is 2nd gear on a roll when i romp on it and smoke the tires LOL.A MUST HAVE


    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    November 25, 2011

    Ohh yeah!!

    Man these gears are awesome! Car pulls super hard in first and second gear. Rpms stay high so you stay in the power band of the vehicle. I improved my 60ft time from 2.0 to 1.8 with the gears and regular high performance street tires. If you are looking for more low end power get these gears, if your looking to save the good gas milage, stay away from these. My mpg dropped about 4-5 mpg but that's because I don't keep my foot out of it. I can't, it's just too fun to stomp it and hang on lol!! Get these gears, best mod I have done yet. I run 13.24 @ 105mph on just an intake, sct tuner, exhaust and gears. Next mod will be control arms and drag radials. I will run 12s!


    Year: 2012 Submodel: V6 Opelousas, LA

    Helpful (8)

  • 5/5

    May 19, 2011

    Ford racing 3.73 rear gears

    They are insane best purchase by far for my car, I highly recommend it to anyone who likes to spank BMW Z4's ha ha ha

    Nathan Beagan

    Year: 2011 Submodel: V6

    Helpful (7)

  • 5/5

    Installation Time: Shop Install

    January 27, 2012

    3.73 gears are the best upgrade for the price (2012 v6)

    3.73 gears are easily the best bang for your buck. They make the car much more fun to drive and make driving a v6 that more rewarding. You will need to buy 3 quarts of gear oil (I used Royal Purple 75w140). For all the parts and the gear oil it will cost you about $275 plus allow $200 - $350 for install, trust me you will need these installed by a shop unless you are a professional mechanic. They will lower your gas mileage by about 3mpg highway and 1-2 mpg city. Especially since you wont be able to keep your right foot out of it! Also, for all you 11-12 v6 owners after having these installed i test drove a 2011 gt just for a comparison and i can honestly say the gt didn't pull any harder. Definitely recommend these.


    Year: 2012 Submodel: V6 STL, MIssouri

    Helpful (7)

  • 5/5

    Installation Time: Afternoon

    January 29, 2013

    Waking up the Pony

    It has been said before and I will say it again, one of the best mods if not the best one for you Mustang. These gears are of high quality, no whine with them, installation was about 4 hours. And what a difference it makes in waking up your car, these should be factory standard for these cars. It improved the take off for my 2011 Automatic V6 convetible, thus improving 0-60 time. These along with the CAI and the Bama tuner (needed also to corret speedometer) have transformed my car into a beast. Highly recomended, its a must for every mustang.


    Year: 2011 Submodel: V6 Springfield MA

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    August 17, 2012

    2011 V6 3.73 gears

    summary...just get them I researched and debated for a while what gears for my V-6. I had 2000 GT with 4.10, 1985 with 4.30, 2005 with 3.55 and 1994 with 3.73. The 3.73 are great for the 2011 V6, They added very noticeable quickness and zip to the car. 1st gear is a bit too low and truck like, but 2nd to 6th (I have a manual) are perfect. With the stock 2.73's I seldom used 5 and 6, even on highway crusing, sometimes would not use 6th. I'm glad I didn't buy 4.10, I believe they would be too much. They are great on the other mustangs I had, but the 2011 has lower transmission gearing than the older manual trans.


    Year: 2011 Submodel: Other Reading, PA

    Helpful (4)

  • 5/5

    May 11, 2011


    wow what a difference went from 2.73 to the 3.73 its so much faster off the line now


    Year: 2011 Submodel: V6

    Helpful (4)

  • 5/5

    April 09, 2010

    Can you say IMPROVEMEMT?

    Installed on my 03 GT. Install price was $200 trust me if you dont know what you are doing with the shims and setting the backlash have a pro install these, but lauch is much improved 2nd gear is nasty. Went to the local strip with is an 1/8 mile track and ran 9 flat with the help of the AM CAI. Killed a few Comaros in the process and isn't that what we are all after? Buy it stop reading! GO!

    Matt D

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    December 22, 2013

    Worth Every Cent

    I have had these gears installed for almost three months now, And I love them. I had the stock 2.73s before I upgraded to these 3.73s. The old gears were simply to long, first in particular. These gears really have made my 3.7 a lot more energetic. The car pulls hard in every gear now. If I launch my stang at anything over 2500rpm, then I will spin through first, sometimes even second, and possibly into third. These gears and my other mods really have made my little 3.7 into a monster. However, my revs have increased to about 2500 at 70mph on the highway, which has hurt my mpg. If you do a lot of highway driving, then I would suggest higher gears like 3.55s or 3.31s. If your main concern is acceleration, then these 3.73s are a excellent choice. Also, I have not noticed any wine.


    Year: 2013 Submodel: V6 Phoenix, AZ, USA

    Helpful (3)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    May 14, 2012

    Big difference but gear whine without differential change

    Wow. This really makes the car move. Big difference. I got mine installed at a trusted shop. However, my total install price came to $533 with taxes and all. I took the car back because of the gear whine on deceleration. They adjusted the positioning slightly but could not get rid of the whine. They said the gear teeth were making perfect grooves. They also said that they researched this car's rear end and found that 80% of installs have this problem. It seems the only way to get rid of the whine is to install a new differential with the gears. Regardless, the acceleration is worth this cost and whine.


    Year: 2011 Submodel: V6 Chagrin Falls, OH

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    February 13, 2013

    Auto tran re-think

    I have 2013 v6 auto with Bama Tune. Stock has 3.31 gears, then i decided to go with 3.73 gears. The improvement is noticeable , acceleration faster, car seem lighter. But not that much, some reviews say 3.73 transform the 3.7 v6 into beast ( not really ). With automatic , you should go with 4.10 and feel the true beast. Gas millage is not hurt much. My average is 18.3 before for city and 25 freeway. Now with 3.73s its up to 20.0 MPG for city and 23 for FWY. This is a good product anyway. Recommended


    Year: 2013 Submodel: V6 TX

    Helpful (5)

  • 5/5

    Installation Time: Full Day

    July 27, 2012

    Best mod yet !

    I have C&L cai and tune. Installation of these 3.73 turned my v6 into a monster. You get into your power range quicker than those mpg-loving-2.73s. No longer do I lose street races against fellow v6 camaros and 350z. My only draw back is that I didn't update my tune after I had these gears installed and my car was shifting at the wrong points. Once I got my tune updated is when I saw max benefits. However I now have gear whine because I went so long without it updated. No biggy. The benefits far outweighs gear whine. Just make sure you get your tune updated before you drive. I floor it in the city so I don't know those mpgs but highway i went from 34 down to 30.8. Not much loss at all, especially from stock. GET THESE GEARS ! install = 375


    Year: 2012 Submodel: V6 Oklahoma

    Helpful (1)

  • 5/5

    Installation Time: Full Day

    July 23, 2012

    gear swap

    I swapped out my 2.73 gears for 3.73 gears and wow it really makes a difference. I highly recommend getting this product if you want some more "get up and go" . The only bad thing was taking them to a shop to get them installed which was really steep around $550. Of course my mileage went down to around 25-26 highway but i knew that before getting the gears.


    Year: 2012 Submodel: V6 edna tx

    Helpful (1)

  • 5/5

    April 28, 2008

    Great Product

    Once these gears were in there, the car was a beast and burns rubber like crazy! Should be everyone\'s first mod. Don\'t fear the gear! Also, American Muscle never stop impressing me with their great customer service.


    Helpful (1)

  • 4/5

    November 21, 2007

    respectable product

    My first mod, and I can feel the difference.. and not to mention a lot cheaper than other web sites!!!!


    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    March 08, 2012


    All I can say is "WOW", what a difference compared to the stock 3:15 gear in was in my 11' Stang. Another great product delivered by AM with perfect fitment and price to match...if I could only get my ride as fast as they ship there products...hmmm Scott T


    Year: 2011 Submodel: GT Troy, VA

    Helpful (1)

  • 5/5

    October 13, 2010

    Good buy for any guy (or gal)

    Bought gears, install kit, and girdle a few weeks ago and had them professionally installed. Very happy with the gears and how well my car pulls now. If you want to make your car a little quicker without major cash, these gears are an excellent choice.


    Helpful (1)

  • 2/5

    November 02, 2010

    Bad Alignment

    The gears appeared to be well manufactured, but after trying 24 shims to 56 shims in order to get them to align properly, it was evident that they would never work without producing whine or chipping teeth. I have also installed 3.90 gears on another Mustang with no problem whatsoever; I'm buying Motive gears tomorrow because I trust them a good bit more. I recommend not buying these gears unless you know of some way to keep the teeth from not chipping when the gears will only align at the outside rim. I personally don't feel comfortable with the cruddy alignment I had. Also, beware of putting the gears on your car. Just by rotating the gears after putting them in my gear box to see the wear pattern in the paint, I voided my ability to get a refund from AM. I've had other good products from AM, but unfortunately, this isn't one. I recommend Motive.


    Helpful (0)

  • 5/5

    February 21, 2011

    pretty good gears

    Meh, they are ok, I should have gone with 4:10's but they will do for now, acceleration did increase, but I was expecting a little more ooomph


    Helpful (0)

Related Mustang Categories