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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 $186.99 You Save 12% ($22.00)
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$164.99

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  • Item 24001
  • MPN# M-4209-88373N

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    Features, Video & 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)

    Review & Installation Video

    Review & Install Video



    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

    CA Residents: Warning: California's Proposition 65

    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 (88) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.861111 4.9
    • Fit 4.888889 4.9



    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      November 09, 2018

      Woke the car up!

      Aside from the Procharger this rear gear change has really woken up the car. I have to learn the shift timing now that it launches much quicker.

      JJ

      Year: 2014 Submodel: V6

      Helpful (0)

    • 4/5

      Installation Time: Full Day

      November 09, 2018

      04 mustang gt 5 spd

      Liked them a lot brought my car alive better gas mileage than 4.10 gear but not as quick but overall love them

      MstthewJ

      Year: 2004 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      October 26, 2018

      Woke my 5.0 LX up with an AOD

      Very happy with the new gear ratio went from 2.73 to 3.73 and now my AOD 5.0 has new life. Yes I lost some highway fuel economy but who cares the fun factor went up lots. I am still in the break in process so I have yet to try and launch the car from a dead stop but I can tell the gears are there doing what I wanted them to do and that is move me from a stop quicker as well as better over all throttle response

      DougS

      Year: 1991 Submodel: LX

      Helpful (0)

    • 5/5

      Installation Time: Weekend

      Installation Cost: $100-$250

      October 17, 2018

      Felt the diffrence

      It was either 4.10 or 3.73. I picked 3.73 and it was a good decision. If you are a daily driver get this don't go higher gears than this. Very hard install if it's your first time give it to the shop saying it from experience lol. Taking the bearing off the housing and the pinion was very hard even with the right tools. Getting the right pattern was also pain and I did it on the lift. But overall got it done it runs good and can feel the difference. If you're going to buy this also buy the carbon clutches, rear control arms (would recomend whiteline), and buy the bearing and shim kit. It took me a whole week to get done. Shop around for shop install and ask for warrenties.

      Sid

      Year: 2012 Submodel: V6

      Helpful (1)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      September 11, 2018

      Better acceleration response

      Had it professionally installed with a one piece aluminum drive shaft. It still has a whirring sound at high speed. Response acceleration is greatly improved. If we can get the whirring noise fixed I will give it 5 stars.

      JeffW

      Year: 2007 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      September 01, 2018

      3.73 Gears

      Great quality, they run quiet, and really woke up the Mustang.

      VaRocker

      Year: 2001 Submodel: Bullitt

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      July 22, 2018

      Seat of the pants.

      Great seat of the pants feel! Wakes up the performance of the car! I would definitely recommend swapping out gears.

      Sally

      Year: 2005 Submodel: GT

      Helpful (1)

    • 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 (2)

    • 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 (2)

    • 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 (2)

    • 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 (2)

    • 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 (2)

    • 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 (3)

    • 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 (5)

    • 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 (3)

    • 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 (3)

    • 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 (3)

    • 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 (3)

    • 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 (3)

    • 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 (4)

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