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Ford Performance Ring Gear and Pinion Kit - 4.10 Gears (86-93 GT)

Market Price $189.99 You Save 11% ($20.02)
Our Price


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  • Item 24002G87
  • MPN# M-4209-G410A

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

Features & Details

  • Ford Racing Quality
  • Strong Forged Construction
  • 4.10 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 1986-1993 GT and 5.0 LX 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 4.10 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 new Speedometer Gear is an inexpensive way to fix this issue.

Application. This Ford Racing Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs including the GT, 5.0 LX and Cobra models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, 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: 1986 1987 1988 1989 1990 1991 1992 1993 Details

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

Approximate RPM for 1986-1993 GT

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4261 5965        
2 2516 3523 4529 5535 6542  
3 1682 2354 3027 3700 4372 5045
4 1264 1770 2276 2782 3287 3793
5 847 1186 1525 1864 2203 2541

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3034 4248 5462 6676    
2 1854 2596 3338 4080 4821 5563
3 1264 1770 2276 2782 3287 3793
4 843 1180 1517 1854 2192 2529
Will it fit my Mustang?
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93

People Who Bought This Item Also Bought

Most Helpful Reviews

Not too much gear!

I purchased these Ford Racing 410 gears and installed them myself. For those wondering the pinion measured .002 thicker than the original pinion with my 308 gears. This is actually fairly accurate. I ended ...

Read More
Helpful (3)

From 3:27 to 3:73 & now 4:10

Hey everyone I had purchased the 3:73 last year and was amazed from the difference. Well, here I am again and I had the 4:10 installed. Woooooowwww what a difference, The car moves like a rocket. One thing ...

Read More
Helpful (3)

Overall Rating 5 out of 5 stars
Read All 40 Reviews

Customer Photos

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2 Questions / 2 Answers

Ask a Question

Will this ring and pinion work with all Ford 8.8 31 spline rear ends?


  • The Ford Performance 4.10 Gears are designed to work on the 86-93 V8 Mustangs that has an 8.8" rear end.


Helpful (0)

I'm assuming you can install these into the stock diff? I have an 88 gt


  • These Ford Performance 4.10 Gears will install into the stock 8.8" differential. We would highly recommend a rear-end installation kit with bearings, as well as friction modifier with your gear oil. The Ford Performance 4.10 Gears and Install Kit (item 100577) includes all the components for a complete installation on your application.


Helpful (0)

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Customer Reviews (40) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain 4.875 4.9
  • Fit 5 5

  • 5/5

    May 12, 2011

    Not too much gear!

    I purchased these Ford Racing 410 gears and installed them myself. For those wondering the pinion measured .002 thicker than the original pinion with my 308 gears. This is actually fairly accurate. I ended up using the original pinion shim which was .027 thick. I rebuilt my Trac-lok and installed all new bearings along with these 410's to ensure nothing went wrong. In the end I ended up with a backlash of .008, zero runout, and a pinion preload of 22 in. lbs. The gears work great and with my T5 I think they feel great. They are not too much gear for a manual transmission. You do have to shift faster because they get you into your powerband so much quicker. I think 1st gear is a little short but that doesn't bother me. My speedo is exactly 10mph faster than my actual speed without changing the speedometer gear. The gears have not really effected my fuel mileage. If anything I'm wondering if they helped because it seems like I'm doing a little better on fuel. It might be because I reach my cruise speed sooner. Highway speeds are about 2200rpm at 70mph which is better than I thought it would be and that is running 225/50r16 tires. The gears are well worth what paid for on American Muscle and you can't beat the free shipping. If I had to do it over again I would certainly buy these again. Thanks AM!


    Year: 1991 Submodel: GT

    Helpful (3)

  • 5/5

    May 24, 2009

    From 3:27 to 3:73 & now 4:10

    Hey everyone I had purchased the 3:73 last year and was amazed from the difference. Well, here I am again and I had the 4:10 installed. Woooooowwww what a difference, The car moves like a rocket. One thing though I can\'t stay in first gear to long because after 2 seconds from the take off you would have too shift into 2nd. It\'s great I tell you, Just remember for every one gear you upgrade, it increases your rpm\'s by 200, but aslong as you have a stick, your 5th or 6th gear would bring your rpm\'s down to about 1400. This gear is truly a must have.


    Helpful (3)

  • 5/5

    September 09, 2010

    you light up my life

    just had the 410 gears installed on Tuesday, and they are awesome, I had 331 gears with a automatic transmission, and couldn't stand how pathetic it was out of the hole, what a difference the 410 gears are, I am so happy I decided to do this. If your on the fence I would go for it!


    Helpful (2)

  • 5/5

    July 25, 2010

    4.10 gears

    Great gear!!! u can definitely feel the difference..if u have a convertible u must get 4.30 because of the weight!!! I regret not getting them!!!great product overall!!


    Helpful (2)

  • 5/5

    January 24, 2009

    The best!!

    The best mod I have for my paxton blown GT. It really woke up the blower and RPM drop is just right at the blowers powerband!! Gas mileage is the same as before or better, but I havent noticed bad gas mileage at all. Acceleration is a monster. 3rd gear on the freeway is the craziest, and 4th feels like 3rd now. If you are serious about your Mustang, this is it. You wont regret it.


    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    December 27, 2016


    Can't say enough about the Great service from Am product arrived in California on time and was well packaged. Will continue to use American muscle in the future. 4.10 woke the car up big time feels like a rocket ship now.


    Year: 1990 Submodel: LX

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    May 24, 2016

    4.10 Ford Racing Gears

    Unbelievable the difference the way the car pulls now!!!! Woke my 91 LX up big time. I feel the best mod you can do other than intake heads etc etc American Muscle shipped fast....product was great just as described. Get the bearing kit when you swap gears..... Thanks A M!!!


    Year: 1991 Submodel: Other

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 29, 2015

    Ford Racing 4.10 Gears

    Great purchase for your Mustang. I have a high 9 second street driven Fox that i did the 4.10 gear install on. I do recommend a professional install, as it is crucial to properly have the gears shimmed correctly.


    Year: 1990 Submodel: Other Malvern, PA

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    April 04, 2013

    200 for shop install

    super nice GREAT improvement ggot a 5 speed next time ill got 3.73 my first gear is almost useless unless i wanna spin my cheater slicks like crazy 4.10 is a lil much but super fun still


    Year: 1990 Submodel: Other

    Helpful (1)

  • 5/5

    February 19, 2011

    4:10's or nothing!

    If you have a 96 or newer modular engine mustang then you don't need waste your money on anything less than a 4:10! This gear is a wake up call for our engines and is what Ford should have installed from the factory.


    Helpful (1)

  • 5/5

    January 05, 2011


    I got these installed recently and love them! Car shifts right when I want it too in the city (Auto) and avg mpg is increasing in the city as well...I havent tested them out yet cuz im letting them break in but I can feel a difference in responsiveness!


    Helpful (1)

  • 5/5

    December 28, 2010

    pushes you in your seat

    I got these 4.10 gears about 5 years ago, i had 3.73 before and man what a difference it made, car launches faster and responds quicker, i a must have if you want to wake up your mustang. A mustang shop in Denver recommended a go with 4.10 super happy with the swap

    Andres Navarro

    Helpful (1)

  • 4/5

    December 06, 2010

    Had both 3.73 and 4.10's

    Well to start off, these will def. help your acceleration. Im thinking I will go back to the 3.73's because top end is totally lost and at 70 im running 2500rpm+ with these and mpg was def. noticeable with these 4.10's, but they are fun in the city...there just not that great on the highway...probably helps also if you have a 6spd and not a 5 like mine. Cheers!


    Helpful (1)

  • 5/5

    September 26, 2010

    From 3.27 to 4.10

    So, it was time for a rebuild of the rearend. I ordered the Ford Racing 4.10 gears and installed them, I'm here to say, it has made an incredible difference. The cruising rpms went up by 500 or so. A great, noisefree product. Well worth it.


    Helpful (1)

  • 5/5

    September 17, 2010

    from 3:27 to 4:10

    the improvement is unreal, best thing you can do to the car for under $200, and the gas millage difference is almost unnoticeable.


    Helpful (1)

  • 5/5

    September 23, 2009

    4.10 vs 3.73

    These gears are the best bang for the buck i have found! Love Them! Doesnt effect mpg hardly at all. It tacks 2,000 rpm at 60mph. American Muscle is the best. Paid for 3 day shipping and got them in two! Thanks!

    Chad Turner

    Helpful (1)

  • 5/5

    September 07, 2009


    really brought the car to life.


    Helpful (1)

  • 5/5

    June 22, 2009


    installed the 4:10\'s at my shop 2 days ago. as soon as i took the car out on the road it was an incredible difference. i was debating 4:10\'s or 3:73\'s im glad i chose 4:10\'s. It breaks the tires loose in second gear just with throttle, Plus the engine sounds awesome in every gear all the time. I eat up camaro\'s and firebirds now..haha

    Steve C from boston

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 08, 2017

    4.10's shoulda been factory!

    Perfect install. I have abused them heavily at the track all summer. This car should have come factory with 4.10's! Sooo much fun!


    Year: 1990 Submodel: LX

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    June 02, 2017

    4.10 Gears

    Great product easy install only took about 3hrs. No noise after install. Turns about 2300 rpm at 65 with a t5.


    Year: 1990 Submodel: LX

    Helpful (0)

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