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Ford Performance 4.10 Gears (99-04 GT)

94 Reviews
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  • 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

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 ...

Read More
Helpful (3)

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 (3)

Overall Rating 5 out of 5 stars
Read All 94 Reviews

Review & Install Video

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 need traction, and lots of it. That’s why the majority of the parts used for our build today are focused on getting us off the line much quicker, ultimately resulting in faster acceleration. But before we go over all the parts we have in store for our 2000 GT here, let’s get it out of the shop and do a quick 0-60 baseline run, just to see where we stand now. Alright, before we go installing all of our parts for the acceleration pack, we’re going to do a baseline 0-60 run, using our iTSX wireless tuner and my iPad here, just to see where the car stands now, so hit start and here we go. Alright so it looks like we just clicked off a 6.66 0-60 time with our automatic 2000 GT, which is pretty average for this model car. Now we’re going to take our car back into the shop, talk a little bit more about some of the parts we have in store, and get them installed. Since traction is the theme of the day, what better way to get more of it, than by using a set of these NITTO NT555R Drag Radials, those large tread blocks paired with that real soft compound is going to give us a ton of grip both on the street and at the strip, and should really help our GT get off the line. To further help our GT hook we decided to go with some vital suspension components from QA1, starting with these box style rear lower control arms, these bars are a variation of the classic traction bar design, and basically help keep the rear axle from moving around under load, and especially on hard launches, eliminating any excessive wheel hop. We also decided to go with a set of these QA1 adjustable rear upper control arms, that are fully adjustable while still on the car. These are going to be key to adjusting our pinion angle which is not only important for traction, but also for driveline smoothness. These are really going to help firm up the rear end of the car, and eliminate any side to side sloppiness or wiggle, making the car track a lot straighter, and just making for an overall better driving experience. Moving away from our traction and getting into another big contributing factor to our acceleration, that’s right our gearing. From the factory, our automatic 2000 GT came with 3.27 gears, which is pretty weak for acceleration. That’s where these Ford Racing 4.10 gears come into play, simply put, that shorter gear ratio is going to help our car accelerate faster. Quite frankly, I’m quite anxious to see how it’s going to wake up our 2 valve motor. So now that you know what we have in store for our GT, we’re going to hand the car over to the crew and get everything installed, after they’re all done we’re going to take our GT back out on the street, just to see how it behaves on the road, and to see if we’ve improved on our 0-60 time. Alright so we’re out here on the street with our 2000 GT, we just had the acceleration pack installed by the guys back at the shop, and we’re just cruising, I mean the car is very mild mannered, we’re in overdrive, you’d never be able to tell there’s gears in the car, until you do a little squeeze on the throttle, and man does it go. It goes, it goes, and it hooks hard too. I mean we didn’t even have a chance to heat cycle the tires there and it just dead hooked on the street. Car is a little stiffer in the rear, that’s attributed to the stiffer bushings in both the QA1 lower and upper control arms, but that’s going to be a good thing, that’s going to help keep the car straight, going down the track, it’s also going to reduce our wheel hop as well, and overall just improve our acceleration. So now we’ve had the chance to drive the car around on the street a little bit, see how it reacts in everyday situations, we’re going to put it to the ultimate test, get it back to the shop, do a hard launch, and see if these parts work in lowering our 0-60 time. Alright, so we just finished up our second 0-60 run, and we just clicked off a 5.09 second 0-60, that’s over half a second off our baseline number, so it’s easy to see our acceleration pack is doing its job, and I’ve got to admit, those radials definitely helped us hook on the pavement. So that does it for the acceleration pack, be sure to check out our other 99-04 bolt on build ups where we make our GT handle a bit better, we give it some more power, and dress it up a little bit.

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11 Questions / 14 Answers

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i have a 2003 mustang gt and im debating between 3.73 and 4.10 gears. i do daily drive the car and it is on the highway often. would 4.10 be too much? would there still be a decent first gear left? please help its a hard decision.


  • If your car is a daily driver and is on the highway I would recommend getting the Ford Performance 3.73 Gears (99-04 GT). The 3.73 gears will be better for high way driving.


    Good Answer (0) (0)

Question Resolved

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


  • 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!


    Good Answer (22) (0)

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.


  • 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.


    Good Answer (5) (2)

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


  • It ensures that your traction lok will function as it was intended to from the factory (for me, that means that I can slide around corners (both left and right) with the rear end hanging out there, and both rear tires spinning; before rebuilding it, I could "drift" turning left, but right turns resulted in "one wheel peal"..... and no sliding!) Hope that helps! Plus, if you're changing gears anyways, that is the perfect time to rebuild the traction lok


    Good Answer (0) (0)

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Will this gear lower my top end speed? My car had 3.90 gears installed from the previous owner, and is crazy fast at accelerating from 0-112mph, but that is all it can do. The car doesn't go above that speed for some reason. I don't know if this is because of the gears or the differential as a whole, but if it is the gears, will tis lower the top end even more?


  • It will allow you to get there quicker and using 5th gear will probably keep your top end speed. Not knowing how strong your motor is 112 mph seems like something else is holding your speed down. Think about finding a chassis dyno and check it out for top end power.


    Good Answer (1) (0)

Show 2 more answers Question Resolved

Top Speed? I have a 2002 Mustang GT with a cold air intake and magnaflow exhaust. I currently have the stock 3:27 gears. With these gears I can run 70 mph in 2nd and 105 in 3rd "pushing it pretty hard". Over the summer I am wanting to put some new gears in the car and I'm trying to pick between 3:73 and 4:10's. I'm leaning toward the 4:10's, but I'm worried about my top end loss. I was wandering if anyone had any advice. That could help my decide. Also if you have any idea what my top end would be with either gear ratio, that would be helpful too.


  • Here's my take and I don't want to upset the Don't fear the gear guys however, my 2004 GT went from stock to 3.73 and all was good till I decided to go 4.10. Now I have to either shift from 1st to 2nd from a stop before I cross the intersection or start from 2nd. Is it quick? Yes, do I wish I should have stayed 3.73? Yes. My MPG lost 2mpg. My advice, if you want to haul azz out the hole every stop or live on the track then go for the 4.10! As for me, I miss my 3.73, however since it's not a daily driver I'll stay with the 4.10.....just get out of my way ; -))


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Customer Reviews (94) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.725 4.7
  • Fit 4.925 4.9

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    July 11, 2012

    Don't Wait Any Longer

    I just had the Ford Racing 4.10 gears installed, and couldn't be happier. The performance difference (vs. 3.27) is huge. The freeway RPM (which I was a little nervous about) is very acceptable. 70MPH and even 80MPH are no problem - comfortable cruising. Also, the part I worried about most: noise and vibration, were no problem at all. They're factory quiet on both acceleration and deceleration. I highly recommend the gear. BTW: fuel economy has suffered, only because I can't keep my foot out of it..... its so fun! I'll probably be able to more realistically assess after a few weeks.


    Year: 2000 Submodel: GT Lynden, WA 98264, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    April 24, 2012

    4:10 drag gears

    i would recommend this for any mustang enthusiast.! helps alot, i have a CAI and a flomaster 40 series exhaust and it is tuned on the 93 race tune and with the drag gears i walk on evos/sti's/and newer gt mustangs all day long! great buy!


    Year: 2003 Submodel: GT

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    January 15, 2012


    I was stuck on the fence between 3.73 and 4.10s. Im so glad i went with the 4.10s. Im very pleased with this product. 3.73s would have never made me happy. I have a 2000 gt with Diablo Super Chip, Steeda Pullies,BBK TB and Plenum, Injectors and ofcourse intake and exhaust. All of these mods together didnt make the difference these gears did. I run Sumitto 315 HTR 35/ zr 17s . Which is as wide as i can go without geting radial slicks. In first and second i still spin the tires all the way through with these gears. I know your thinking well thats not good. But even spininng i have so much excelleration that i still Smoke the New SS Camero......I mean completly leave it...... I wish this was the first mod i did to my STANG.......If your stock of your motor is tricked out you need these gears for the crazy acceleration and everytime you shift your in the powerband.......I


    Year: 2000 Submodel: GT Birmingham AL

    Helpful (3) (0)

  • 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 (3) (0)

  • 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 (3) (0)

  • 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 Submodel: GT

    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 Submodel: GT

    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

    June 07, 2011

    You will love these things!

    I did a lot of research on gears for over a year and now I mad at myself for waiting so long. I thought the gas mileage would be bad but it's not at all, you can tell a difference but not bad. It makes it all worth it when you catch second and get sideways. Be careful because if the 4.10s wake up your car this much you will crave more. I see guys say they install them at home, well I watched the guy put mine in and there is no way I would want to do this job in the driveway. If you are on the fence and worried I would tell you to go for it! I hate spending lot money just like the next guy but this has truly been well worth the money.

    Tony P

    Year: 2002 Submodel: GT

    Helpful (2) (1)

  • 5/5

    August 31, 2009

    Slap LS1s

    3.73 wont cut it get the 4.10s i got mine installed for 300$ leading shop wanted 600$ most wanted 500$ take your time finding the right people to install them


    Helpful (2) (1)

  • 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 Submodel: Mach 1 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 Submodel: GT

    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!


    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 Submodel: GT Bay Area

    Helpful (5) (0)

  • 5/5

    Installation Time: Afternoon

    September 01, 2012

    Just what I wanted

    Bought this product with with 31 spline and differential and it knocked .4 tenths off my quarter mile! Which is a lot, I get 26 mpg and I have full bolt ons! Don't wait buy it now! -Daniel Hudson owner of a full bolt on 03 GT that runs in 12's in quarter mile thanks to American muscle!


    Year: 2003 Submodel: GT Conway, ar

    Helpful (3) (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 Submodel: GT 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 Submodel: GT

    Helpful (3) (0)

  • 5/5

    June 08, 2011

    Best Mod for the $$$

    I had reservations about getting this steep of a gear, but let me tell you something. I couldn't not have made a better decision and I know that if I went with the 3.73's I wouldn't be near as happy. Don't worry about highway speeds either... 2,500rpm at 75mph is perfectly tolerable. The new edge's are dogs in the low end and these gears make it a whole new animal. Highly recommended.

    Nick P

    Year: 2002 Submodel: GT

    Helpful (2) (0)

  • 5/5

    May 01, 2010

    4.10's all the way!

    i got the gears and the rebuild kit. took me from 14.0 @ about 101mph to 13.51 @ 108. my car is a daily driver and my gas mileage actually improved! Great buy, i recommend for these for everyone, its a must have!

    Nauder Bastankhah

    Helpful (2) (0)

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