Win A 2018 RTR Spec 3 Mustang Enter Now!
Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST

3 Days Left for Free Shipping! Get it by Dec 24th available on most items - Details

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

Market Price $187.99 You Save 12% ($23.02)
Our Price


FREE Shipping
  • Item 24001
  • MPN# M-4209-88373

Out of Stock Notify Me Choose options to add to cart

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
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 11, 12, 13, 14
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 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

Fits Mustangs equipped with a 8.8" rear end

Most Helpful Reviews

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. ...

Read More
Helpful (27)

3.73 2008 GT

What gear do I get? That is the question burning through your mind, dear reader. I have not had a 4.10 in my car but putting in the 3.73 is with out a doubt a perfect match! The car is tighter on the pick ...

Read More
Helpful (18)

Overall Rating 4.9 out of 5 stars
Read All 75 Reviews

Customer Photos (2) Submit Your Photo

View All 2 Photos

You Might Also Like

Q & A

No questions about this product yet.

Ask the First Question

More Products You Might Like

Customer Reviews (75) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

  • Performance Gain 4.913043 4.9
  • Fit 4.913043 4.9

  • 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

    Year: 2003 Submodel: GT

    Helpful (27)

  • 5/5

    May 28, 2010

    3.73 2008 GT

    What gear do I get? That is the question burning through your mind, dear reader. I have not had a 4.10 in my car but putting in the 3.73 is with out a doubt a perfect match! The car is tighter on the pick up and it goes like stink! When you want it to be tame it will do that too. RPM increase at 60 mph is only about 200 RPM. Very little loss for a very big gain! I had mine installed by a good mechanic and that ran me a little over $300. A perfectly balanced gear.

    Douglas Kirk

    Year: 2008 Submodel: GT

    Helpful (18)

  • 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 (17)

  • 5/5

    April 05, 2010

    04GT 3.73gears

    DONT FEAR THE GEAR! The perfect gear for a street car. Decent RPMs on the highway and crazy excelleration through first 3gears. Have them installed by an experiance tech who has done these before. Its hard to keep my foot out of it now!

    Dickie Ayer

    Year: 2004 Submodel: GT

    Helpful (15)

  • 5/5

    May 06, 2010

    3.73 Gear Install

    I just had my 3.73's installed the other day on my 96 GT conv. MAN!!! What a difference. I would defintely recommend buying the bearing kit and the Royal Purple Max Gear oil. I did and I don't have any sort of whine, it is just very smooth, and definetly pulls much harder in 1st, 2nd, and 3rd. Thanks to AM for another perfect order!!!


    Year: 1996 Submodel: GT

    Helpful (12)

  • 5/5

    July 21, 2009


    Finally installed my 3.73s- wish I had done it sooner. Good luck trying to shift to third- the g-forces will keep you VERY well planted!


    Helpful (11)

  • 5/5

    May 21, 2010


    I am very happy of what i got for my GT 95 automatic it really make a difference on the start i need to be carefull to not burn my tire to fast btw very nice product and easy instalation


    Year: 1995 Submodel: GT

    Helpful (10)

  • 5/5

    May 23, 2008

    Need For Speed

    These 3:73 gears are awesome. Ford should have built mustangs with these gears instead of the whimpy 3:27\'s. Be prepared to get whiplashed while switching through gears. And if your good with the stick (manual transmission) you can burn rubber in 3rd gear too. These gears unleashed the beast within my 03 mustang they are a must have.


    Year: 2003

    Helpful (10)

  • 5/5

    May 31, 2010


    Looked at a few gear ratios but couldnt really decide. i wanted something that would make a big difference, but i wanted it to have good street manners as well. went with the 3.73's and it was the ticket dead on. puts me in the rpm range when i need them, yet lets me cruise in 5th with an acceptable rpm range. be sure to get the install kit and you should be good to go. i did the install with a friend and was able to get it done in 4 hours; but prepare for a fight. AM was great as always, fast shipping quality product. (wish this was my 1st mod performed, huge difference over stock which was a 3.27 in my stang)

    Joshua B

    Helpful (9)

  • 5/5

    January 14, 2011


    i was trying to decide to go 3.73 or 4.10 but 4.10 will be to much. i went for 3.73 and got them installed at a profesional shop at houston performance and woooooow big difference, i love the way my 5.0l 94 stang, pulls now 2nd 3rd and 4th even 5th gear feels like 3rd going at 40 or 50 mph very pleased. if u are thinking about 4.10 and 3.73 go for 3.73 u wouldnt regret it. i recommend

    sergio fernandez

    Year: 1994

    Helpful (7)

  • 5/5

    May 12, 2010

    3.73 Gears

    These gears are great, It really woke my car up. I feel a world of difference. I looked into 4.10 gears but I would have lost a lot of top end, These gears are still okay on the freeway. Definatly a good move. Get the speed cal unit to correct speedo you will need it.


    Helpful (7)

  • 5/5

    March 03, 2010

    Everyone should get gears!

    I put these and a new diff in my 94 GT... otherwise basically stock... and WOW it really does make a difference... if you are thinking about it... DO IT! you will not regret it!

    Dave Anderson

    Year: 1994 Submodel: GT

    Helpful (7)

  • 5/5

    December 13, 2009

    Dont Fear the gear!

    What a difference!. car actully pulls hard like a V8 should..if i was to do it over again prolly would have went 4.10's but 3.73 are a great daily driver gear...still love the 3.73's


    Helpful (7)

  • 5/5

    September 18, 2009

    Great product

    I noticed a huge difference with this upgrade without sacrificing gas mileage. Highly recommended

    Patrick Mynes

    Helpful (7)

  • 5/5

    February 15, 2010

    !!!!!! HOLY SH*T !!!!!!!!

    Put on hot rod cams and had to change my gears for the cmas... since its my daily i put in the 3.73's...... from 3.55... OMG what a difference.... its like my car went from ... wow that prety fast to..."HLY F*CKIN SH#T" best performance mod fo the buck hands down!!!!!


    Helpful (6)

  • 5/5

    February 21, 2009


    3.73 gears woke my 2006 Mustang up in a huge way. There good for both everyday driving and burning up the track!!!


    Year: 2006

    Helpful (5)

  • 5/5

    February 08, 2011


    Just had these beasts put in. They have an amazing difference i had them done professionally by gambardellas racing in williamstown nj they did a excellent job for only 250. the speedo is up 7mph for the 02 mustang gt with the tr3650 tranny so its not a big deal. thanks am you guys are the best!


    Year: 2002 Submodel: GT

    Helpful (4)

  • 5/5

    April 30, 2010


    I bought these for my 2003 GT 5spd with the TR3650 and it is a new beast! It is very quick from a stop now and should shave 3 tenths or so off your 1/4 mile time, gas mileage wasnt really affected in fact it improved a little because I drive a lot in the city at speeds around 35-50mph and rarely go over 85mph so if you drive in the city and the highway at speeds around 75mph @ 2200rpms you will get about 21mpg. The gears have a little decel whine in 3rd gear but it isnt bad at all. Be shure to buy the Motive bearing kit when you do the install or you will regret it and I got mine installed for around 300 bucks at a local shop.


    Year: 2003 Submodel: GT

    Helpful (4)

  • 5/5

    October 24, 2009


    Wow these gears amazing. I have an automatic and these gears made a HUGE difference. Thank you Ford Racing and American Muscle.


    Helpful (4)

  • 5/5

    August 15, 2009

    Great drivability

    Tore up a 3.90 ratio set and put this instead! In my opinion felt better! Did not lose the top end like before!

    Josh Hastings

    Year: 1990

    Helpful (4)

Related Mustang Categories