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Ford Performance Ring and Pinion Gear Kit; 3.73 Gear Ratio (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

Item 24001
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      Review & Installation Video

      If you're looking to improve the off-the-line acceleration in performance but without adding any horsepower, stepping up to a numerically higher gear ratio is a great way to do so. Now, the Ford Performance 3.73s that we have here will fit the '86 to '14 V8, the '11 to '14 V6 and '13 to '14 GT 500 equipped with the 8.8 solid rear end. Now, this thing will include your ring and pinion as you can see for right around the $150 price point. And the install will not be for the first time mechanics out there as there is quite a bit of work involved to set up a rear end properly, but we will graze over that here in a bit. So, it's no secret that the factory gear ratio for most of the early cars and I'm talking Fox bodies, SN95s and even some of those early S197s wasn't exactly ideal for scorching off-the-line performance and acceleration. In fact, it was quite the opposite. Now, most of these early cars were working with a 2.73, a 3.08 or in some cases a 3.27 but that was pretty much it until some of those later S197s finally ushered in an optional 3.55. Now, with all that said, again a great way to increase the off-the-line acceleration and performance but without bolting on any go fast parts is to install a numerically higher gear ratio or shorter gear as you'll sometimes hear it described as, which will again help get you up to speed and through those gears a little bit faster. The only drawback here, guys, is a slight hit to your fuel economy but with the days of overdrive transmissions, it's not nearly as bad as it used to be on those old school four-speed cars. But getting to the kit that we have here and again with that fuel economy thing in mind, I would argue a lot of people would probably prefer a 3.73 to a more aggressive 4.10 because depending on your factory gear ratio, you're still getting a much shorter gear with the 3.73, especially if you have like a Fox body with a 2.73 for instance and it's gonna feel totally different but without turning a bunch more RPM on the highway while cruising like you would with a 4.10, so overall, guys, it's gonna be a great compromise. Now as far as the physical gears and construction are concerned, well nothing but the best from Ford Performance as you might imagine, strong forge construction, CNC cut all with lap teeth and then finished off in that black oxide coating. The gears have been made in the USA and Ford Performance claims that these are going to be some of the quietest gears available for that 8.8 solid rear axle. But of course, the biggest cause of noise with a new set of gears will be from either poor installation or poor setup. Listen, guys, installing a new set of gears is a bit of an art form and does involve a decent amount of work along with some specialty tools to get everything dialed in properly. So because of that, we are gonna knock this one up to a full three out of three wrenches on the old difficulty meter. Now, if you don't them set up properly, including your proper backlash, your pattern, your depth all that good stuff could lead to a noisy operation as I just mentioned. So, therefore I will recommend most owners out there who aren't prepared to handle this kind of job, take it to your local shop. It's gonna cost you a few hundred bucks, maybe even close to a thousand depending on your area but you'll thank me at the end of the day.But one thing to keep in mind here, guys, is that after a gear install, especially one with a very drastic change, your speedometer will no doubt be considerably off, so, therefore, you will need to correct it. Now '79 to '98 V8 owners can simply replace the speedo gear and that will be the most cost-effective way to go, '99 and newer owners, on the other hand, can either fix it through a handheld device or tuner or you can look into a speedo recalibration box from Ford Performance for couple of hundred bucks. But wrapping things up here, guys. If you're looking to improve your off-the-line acceleration and grunt and work on those VTs a set of 3.73s from Ford Performance would be an excellent choice. And you can grab yours right here at

      Product Information

      Features, Description, Reviews, Specs & Installation


      • Strong Forged Construction
      • For Street or Track Use
      • Ford Racing Quality
      • 3.73 Gear Ratio
      • 8.8" Ring Gear Diameter
      • Fits 1986-2014 V8 and 2011-2014 V6 (Excludes 2013-2014 GT500)


      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.Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue. Application. This Ford Racing Ring and Pinion Gear set will fit all 1986 to 2012 V8 Mustangs including GT, Bullitt, Mach 1, Cobra and the 2011-2014 V6 Mustangs equipped with the 8.8" rear end. 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.

      Installation & Tech
      Differential Gears - Installation Instructions!Differential Gears - Installation Instructions!Mustang Rear Gears - Tech Article Mustang Rear Gears - Tech Article

      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 2010 2011 2012 2013 2014 Details

      MPN# M-4209-88373N

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 100+ customers

      Installation Time: Weekend

      Installation Cost: $250-$500

      • March 06, 2020

        5 2000 GT - JBGT Installation Time: Afternoon

        Ford gears are the way to go

        Gears are made well and have a good finish on them. Install was straight forward and the directions are clear. I reused the factory pinion shim and only had to adjust backlash .008". Pinion depth was right on.

        Helpful (0)
      • March 01, 2020

        5 2004 GT - Ricciardiiiiii Installation Time: Afternoon

        Much needed

        Went from a 2.73 to a 3.73, also have the termi posi installed. My merc boogies now

        Helpful (0)
      • February 07, 2020

        5 2001 Bullitt - Joseph31

        Great place for mustang parts

        Great gear no no issues with the gear got it fast you can feel the power

        Helpful (0)
      • February 03, 2020

        5 1993 GT - DirtyD Installation Time: Afternoon

        Not too shabby

        I actually installed these in my 05 Grand Marquis with a Ford Racing Trac-Lok differential. Not exactly night and day but a very nice improvement to say the least. Still managing 22mpg average hwy travel with minor bolt on's and a tuner on 93. This was the coolest and safest 4 door sedan I could think to put my kids in. Why not make it even cooler.

        Helpful (0)
      • January 05, 2020

        4 2007 GT - Jay Installation Time: Weekend

        Best Performance Gain for the $$

        Good Quality, Complete Kit, Awesome performance gain!!! 4 stars because even with correct backlash (0.010 - 0.011") and a great contact pattern, I still have gear whine noise at highway speeds.....still would recommend as the performance gain outweighs the slight increase in noise. This is what Ford should have put in their manual ponies from the factory...I assume they didn't for fuel economy reasons, but I am still getting over 20 mpg!! (when driven easily)

        Helpful (0)
      • December 29, 2019

        5 2003 GT - Bitty


        Quality parts at affordable prices. Kit came complete with more than enough parts for a quality install

        Helpful (0)
      • December 23, 2019

        3 2002 GT - Dingo Installation Time: Shop Install Installation Cost: $250-$500

        Slight improvement

        For the money spent on gears, I could have increased hp 125 w/ nitrous

        Helpful (0)
      • December 19, 2019

        5 2008 GT - JeffS Installation Time: Afternoon

        Just what I needed

        Gears made a world of difference in the acceleration when u hit the throttle. I put the gears in my 2008 mustang gt convertible automatic.

        Helpful (2)
      • December 19, 2019

        5 2003 GT - PWGRACING Installation Time: Afternoon

        For my 03 Mustang GT

        I love it. It gave me a good traction 3.73 gears. Great performance.

        Helpful (0)
      • November 03, 2019

        4 2001 GT - Maxi Installation Time: Afternoon


        Good product solid material grabs hard squels harder

        Helpful (0)

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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Pinion Gear
      • (1) Ring Gear

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • Bullitt - 01, 08, 09
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
      • Cobra R - 93, 95, 00
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
      • GT500 - 07, 08, 09, 10, 11, 12
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 86
      • V6 - 11, 12, 13, 14

      Fits Mustangs equipped with a 8.8" rear end

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