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Ford Racing 4.10 Gears (99-04 GT)

90 Reviews
Our Price


  • Item #24002G99
  • MPN# M-4209-G410A

  • Market Price $173.99
  • You Save 17% ($29.01)
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Product Videos Customer Photos
  • Ford Racing Quality
  • Strong Forged Construction
  • 4.10 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 1999-2004 GT, Bullitt, Mach 1 and Cobra 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 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 1999 to 2004 V8 Mustangs including the GT, Bullitt, Mach 1 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: 1999 2000 2001 2002 2003 2004 Details

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

Approximate RPM for 1999-2004 GT

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4274 5983        
2 2529 3540 4552 5563 6575  
3 1669 2337 3004 3672 4339 5007
4 1264 1770 2276 2782 3287 3793
5 860 1204 1548 1891 2235 2579

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3591 5027 6463      
2 1960 2744 3528 4311 5095 5879
3 1264 1770 2276 2782 3287 3793
4 885 1239 1593 1947 2301 2655
Will it fit my Mustang?
  • Bullitt - 01
  • Mach 1 - 03, 04
  • Cobra - 99, 01, 03, 04
  • GT - 99, 00, 01, 02, 03, 04

Most Helpful Reviews

2002 GT 5 speed manual

First of all, DON'T FEAR THE GEAR! I jumped from the stock 3.27 to the 4.10's. I was on the fence for weeks on which gear to install. My rpm's at 70 mph are around 2300. These gears are NOT too much ...

Read More
Helpful (32)

02 GT Auto - GT

Got these gears installed yesterday. 2002 Mustang GT Automatic is now a sports car and not a cruiser anymore. Really woke up the car, 1st gear is a monster, 2nd gear burn out and then takes off from some ...

Read More
Helpful (13)

Read All 90 Reviews
Overall Rating 5 out of 5 stars


I’m Justin with, and this is our acceleration pack bolt on build up for all 99-04 Mustang GTs. The focus of this pack is of course acceleration, but in order to accelerate faster you View Full Transcript

Customer Photos (5) View All Photos

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11 Questions / 8 Answers

Ask a Question

which gears would be better for my manual 2003 mustang gt? which gears would be better? I have read that the 4.10 gears are too much for a manual tranny

arnol Year: 2003 Model: GT

  • On a manual, the 4.10s is actually what we recommend. We would suggest the 3.73s for an automatic transmission as being the best option. You wouldn't be disappointed choosing the 4.10 gears. It gets you going faster, faster - which is the ultimate goal! The MPG loss between 3.73 and 4.10 is marginal and the increased acceleration of the 4.10s is well worth it! Hope this helps!

    Best Answer

    LisaS Year: 1992 Model: GT

    Good Answer (22)

Show 3 more answers Question Resolved

Will it improve automatics as well? Will the improvement gains on an automatic be the same or similar to those of a manual? Mine is an automatic and want to know whether it would be beneficial to upgrade gears or if there is a better way to go.

BLane13 Year: 1999 Model: GT

  • It is recommended 4.10 gears for automatics. The result will be the same for manuals. Though automatics lose most of its power in tranny. You will see about .4 of a different in quarter mile. Which you will feel very much.

    Best Answer

    Speedmister Year: 2003 Model: GT Top 500 Contributor

    Good Answer (5)

Show 1 more answer Question Resolved

what is the traction-lok rebuild kit and what is its purpose?

jfleetusmc Year: 2000 Model: GT

  • For the vehicles equipped with a factory limited slip differential this is the kit to rebuild the carrier, so that the posi trac unit operates correctly.

    Skiddleme Year: 2005 Model: GT Top 100 Contributor

    Good Answer (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

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Customer Reviews (90) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.717949 4.7
  • Fit 4.923077 4.9
  • Bang For Your Buck 4.820513 4.8

  • 5/5

    February 14, 2011

    2002 GT 5 speed manual

    First of all, DON'T FEAR THE GEAR! I jumped from the stock 3.27 to the 4.10's. I was on the fence for weeks on which gear to install. My rpm's at 70 mph are around 2300. These gears are NOT too much for the 5 speeds. I would have been fine going with even more. Your first gear is so sweet. No more feathering the clutch in reverse because of fear of backing up too fast. You can put it in first gear, let out on the clutch, roll for a bit, then punch it and it will smoke the rear tires. Same goes for secong gear. You can constantly get fourth gear scratches. I am pretty much stock except for a CAI, speed shifter and under drive pulleys. This is the first mod anyone should do. There is no way I would have been as happy with 3.73's. I had a professional Mustang speed shop in Houston, Tx install them for a very reasonable price.

    William W

    Year: 2002 Model: GT Driving Style: Street / Strip

    Helpful (32) (0)

  • 5/5

    February 12, 2011

    02 GT Auto - GT

    Got these gears installed yesterday. 2002 Mustang GT Automatic is now a sports car and not a cruiser anymore. Really woke up the car, 1st gear is a monster, 2nd gear burn out and then takes off from some more thrill riding fun. 55 at 2100 RPM's. Perfect gear for 3 speed auto with OD.


    Year: 2002 Model: GT Driving Style: Daily Driver

    Helpful (13) (0)

  • 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 (17) (2)

  • 5/5

    October 14, 2007

    Best gear

    Do not use anything other then Ford Racing in your rear, easiest to install and no noise from your rear.

    Dave Gober

    Helpful (10) (0)

  • 5/5

    Installation Time: Shop Install

    October 26, 2011

    Great bang for buck!

    Have always been afraid of gearing to low for the street. Didn't ever put then in my 05 gt or 89gt. Finally decided to in my 04 mach. BEST UPGRADE YET. Runs perfect around town and interstate. Can easily accelerate from 25mph in 4th gear. Would recommend to anyone and will b putting 4.10s in many mustangs to come!


    Year: 2004 Model: Mach 1 Driving Style: Daily Driver 'Stangs I have owned: 3 shawnee oklahoma

    Helpful (8) (0)

  • 5/5

    March 24, 2011

    Best bang for your buck!!

    Picked these gears up about a month ago and couldnt be happier with the end result. I have a 01 manual gt and the above mph/rpm ratings seem pretty accurate! Installed myself in about 4 hours (first time tearing a rear end apart... Not bad at all. Just make sure you buy the instally kit as you NEED half of what comes with it! Gear lash is perfect and I have no whine at highway speeds or any speed. Combine with a SCT Tuner for optimum gains. Not bad highway cruising either... As for a speed comparison lets just say I smoke most 06 body style gt's as long as they are not geared lol. Overall grear product from Ford Racing and AM. I live in MD and recieved the package in 2 days( including purchase day)


    Year: 2001 Model: GT Driving Style: Show

    Helpful (7) (0)

  • 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!


    Driving Style: Daily Driver

    Helpful (7) (1)

  • 5/5

    Installation Time: Full Day

    August 23, 2011

    Great mod for NA stangers!!

    I was skeptical about the 4.10's at first, but this is a great mod. Much more torque feeling/ throttle is way more responsive. You will loose a little top end, but not much. THE BREAK IN IS CRITICAL, So go easy on them for the first 500. Also, you will see the mpg go down a bit if you can't keep it at 65. If you plan or have forced induction I wouldn't recommend these. YOU WILL need to recalibrate your speedo because your odometer will start acquiring more miles than it actually has. Thanks again AM your awesome! Always good quality products at a fair price with excellent shipping.


    Year: 1999 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Bay Area

    Helpful (5) (0)

  • 5/5

    Installation Time: Afternoon

    February 23, 2012


    great product shipping took a little longer then expected to Canada but overall very impressed with product i have seen mixed reviews on if you need to break these in and the mechanic told me not to worry about it and drive it like you want too!! just to make sure you change the fluid after 300-500km so im just using a cheap oil and then after 300km im going to use royal purple thanks AM!!


    Year: 1999 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 cananda

    Helpful (3) (0)

  • 5/5

    June 27, 2009

    4.10\'s for 96 Manual GT

    Just got the 4.10\'s put in yesterday and can feel a huge difference. 2nd and 3rd gear really hauls now! Goes perfect with my short throw shifter. Glad i did\'nt go with 3.73. If you\'re debating between 3.73 and 4.10\'s go with 4.10\'s, you will not be sorry.

    Zack from Denver

    Year: 1996 Model: GT

    Helpful (3) (0)

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