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

Market Price $190.99 You Save 12% ($22.00)
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  • Item 24001
  • MPN# M-4209-88373N

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    Features & Details

    • 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

    What's in the Box
    Hardware included:
    • Ring
    • Pinion
    • Crush sleeve
    • Pinion nut
    • Shims
    Installation Info
    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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    Customer Reviews (81) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$250-$500

    • Performance Gain 4.862069 4.9
    • Fit 4.896552 4.9



    • 5/5

      Installation Time: Afternoon

      June 29, 2018

      Ford 3.73 gears

      Theses gears are great . They gave me the extra boost I needed. Cost 450$ to install and it is worth every penny. Great for acceleration and torque.

      RonaldA

      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Full Day

      June 25, 2018

      373 gear set

      Complete set comes with every thing you need too rebuild your 8.8 rear end. Installed prefect. Good gear set for manual trans. Rpms are still good. Your Speedo will b off a little. And you may want to get another bottle of royal purple to top off the oil. I would recommend!

      JeremyP

      Year: 2009 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      June 21, 2018

      Getty up and go!

      The 3.73 years are huge step up form the stock 3.31 gears that came with my 09 GT. I got these because the 4.10 gears were backordered and many seem to thing 4.10 is to short of a gear for a 5 speed. I went with the 3.73 on a buddy recommendation that had both. I also got the motive bearing install kit and the GT500 carbon clutch disk pack as well. I had a shop install then and they whined from the get go. I told the shop it was not shimmied properly and they told me to brake it all in because it was all new parts. I knew that this was a un true statement. I put the 500 break in miles on it and took it back to be re shimmied, it took the a additional 2 tries till they got is set perfect. When I changed the fluid after the 500 mile break in I went with a fully synthetic 75-140W and traction additive. The 75-140 is reccomend over 75-90W if the car is going to see a lot of hard launches. At 80mph in 5th gear my tach is reading 2350rmps and I have it calibrated for the gearing with my tuner. 1st great will see almost 40mph when you stomp on it with alot of wheel spin if you dump the clutch. I am Shifting into 5th at120mph now. I will upgrade to 295/40R18 nittos soon from my 255/45R18 Firestones and hope to pick up some more traction thier. This gear is perfect in my opinion, dont hesitate get em now!

      BenjaminA

      Year: 2009 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Full Day

      June 05, 2018

      Excellent gears

      Easy enough to install. Very quit gears with no whining.

      JoshuaH

      Year: 2004 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 01, 2018

      Worth the money

      A lot more fun to drive with these. Worth every penny

      Larry

      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      March 08, 2018

      Love this product

      This product is the best gears out there best bang for your buck

      DeanS

      Year: 1996 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      August 28, 2017

      Night and day

      Off the line with full bolt ons Im right there with my dads 5oh giving him a run for his dinero recommend get the bearing and seal set as well good insurance plus you get an extra crush sleeve if you duck up Took 4 hours to install a lot easier then it looks

      PaulB

      Year: 2013 Submodel: V6

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      August 03, 2017

      3.73 rear gear set

      If you want to wake up your car buy these! Its unreal how much faster the car feels off the line

      MyrtF

      Year: 2002 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      July 28, 2017

      Go for Power

      Good product better performance and field more strong

      CuauhtemocB

      Year: 2004 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Full Day

      June 27, 2017

      New pony

      installed on my 2008 gt. Turned my car into a totally new car.. (brought it to life) pounded rev limiter on launches until i got my bama tune! had performance shop install 600 bucks so it was done right! a must to ever pony owner!

      chalka

      Year: 2008 Submodel: GT

      Helpful (2)

    • 5/5

      August 27, 2016

      Get the gear

      185 thousand miles and this mustang new clutch and c 3.73 gear pulls like a mofo so glad I had it done

      Jeepers

      Year: 1998 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      July 31, 2014

      WAKE UP!!!!!!

      I waited to review these gears until I'd gotten past the "500 break in" miles. MAN what a difference these gears make!! I did a lot of research on the 3.73s vs the 4.10s and chose these based on feedback I'd gotten from others, based on my particular driving needs. Although it's not a daily driver, it still gets out of the garage a time or two per week and most of the miles I drive are highway. That said, these gears REALLY woke up my car! You're going to lose (noticeably) a little bit of your first and second gears, but that's what these smaller gears DO. They get you into the power band QUICKER so you can accelerate quicker! It's so much more fun to drive now than before. When I swapped the gears, I also added a better CAI (JLT 107mm MAF from a Roush no-tune) so the gas mileage difference is almost non-existent. It appears to be giving me about the same mileage as it did before the upgrades. Also, be sure to price the installation at several reputable shops before taking it to the first one that will do it. I was quoted prices around the $500 and up range before I found a local Mustang performance shop to do the work. Ended up being about $350 with Royal Purple gear oil. If you're reading this, you're already considering changing gears. I'd say DO IT... If you're going to be taking your car to the track I'd say go with the 4.10s but if it's just your street machine, these 3.73s are freakin awesome!

      RMR3326

      Year: 2012 Submodel: GT DFW

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      January 24, 2014

      Ford Racing 3.73 Gears

      I had 2.72 stock gears in my 2014. It was so to take off and also had throttle lag. In my daily driving in town and hwy. I had little use for 5 & 6 gear. After install these gears and I would have a shop do them that knows how install them unless you have expertise in installation. The car now is very quick to take off and it helps with throttle lag a little. I can use 6th gear now and the only negative thing is that I lost approx. 4 mile to the gallon. You can also start off in second gear if you want to, 1st gear runs out very fast. The gear are so quite and have no whining to them I would recommend these gears.

      DuggieC

      Year: 2014 Submodel: V6 New Smyrna Beach, FL, USA

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      June 27, 2013

      3.73 gears

      these gears are great! You will definitely notice a difference.It gave my mustang the kick in the butt it needed

      acknfoolish

      Year: 1997 Submodel: GT Denton, TX, USA

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      April 27, 2013

      Tire tread beware

      You want some pull/ooomph in your stang, well let me tell you this 3.73 rear axle ratio gear set up is the way to go. Stepping into the accelerator you're going to feel the grab and the sensation that wakes up your pony. prepare for Joygasms galore once you have fully unleashed this MUST HAVE modification into your vehicle. For even more exciting fun you can also try 4.10's but a 3.73 gives you the best of street/Hwy/Strip all rolled into one happy joy filled experience. Built FORD tough, warrantied by Ford Racing.

      TheMasterofFunkness

      Year: 2013 Submodel: GT Philly

      Helpful (2)

    • 5/5

      Installation Time: Full Day

      April 08, 2013

      Better than new !

      I got this set of gears as a combo with the bearing kit. I can't tell how much better the car feel because I can't take you for a ride !. But this kit is the best bang for the buck. It did took me a full day as I drop the whole differential and disassemble it, clean it from the inside out, then install all the seals and bearings. All the bearings and seals are original Ford, and so does the gears. The gears comes with a crush sleeve and a nut, so does the bearing kit, so you will end up with a spare nut and sleeve ( good). As for the installation of the gears, if you are new to this or have a good understanding of the installation, then follow the installation instructions and you should be good. Other wise it is recommended to take it to a shop that knows what they are doing. Overall I am really happy with the kit.

      QuiQuepr69

      Year: 1997 Submodel: GT Norfolk, VA, USA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      January 29, 2013

      Great for daily driver

      My car came stock with 2.73 gears. And oh what a difference, new 3.73 gears made. I did a lot of research on what would be the best gears for me. My Mustang is a daily driver and I like to take it out on the back roads for some fun. I don't take it to the track and that is why I did not get 4.10's. If you drive your Mustang daily or often, do yourself a favor and purchase these gears. Make sure to get the install kit as well with all new bearings. You don't want to put new gears in with old bearings do you?

      88GTConvertible

      Year: 1988 Submodel: GT Wilmington, OH 45177, USA

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      December 24, 2012

      First mod period

      I put money in exhaust and a CAI plus tuner. Those these are great additions to any ride. I should started with gears, 3.73 are the best all around for a daily driver in my opinion. I had a shop install them with a bearing kit and posi clutch rebuild kit. Now my car should be set for a long while.

      AlwaysBroke73

      Year: 2007 Submodel: GT Bloomington, IL, USA

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      December 24, 2012

      Big Improvement

      Don't fear the gear - it'll be one of the best things you can do for your car! These were my 2nd set - I previously had Motive 4:10s, and those things were good but the shop had to manually grind them down in order to make them fit. These gears fit perfectly the 1st time. Worth the extra $10-20.

      dustang50

      Year: 2002 Submodel: GT Cleveland, OH

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      December 23, 2012

      Great product!!!

      I had a local shop install it for $350 in 4 hours. After I broke them in I realizes how great they are. A huge improvement in the seat of the pants feeling!! I would definitely recommend these gears to everyone. American Muscle has yet again provided an amazing product!!

      Bigb227

      Year: 2003 Submodel: GT West Palm Beach, FL, USA

      Helpful (2)

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