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Ford Performance Ring Gear and Pinion Kit - 4.10 Gears (99-04 GT)

Market Price $189.99 You Save 11% ($20.02)
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  • Item 24002G99
  • MPN# M-4209-G410A

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    Features, Videos & Details

    • 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

    Review & Installation 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.

    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
    • GT - 99, 00, 01, 02, 03, 04

    People Who Bought This Item Also Bought

    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 (44)


    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 ...

    Read More
    Helpful (22)

    Overall Rating 5 out of 5 stars
    Read All 100+ Reviews

    Customer Photos (1) Submit Your Photo

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    18 Questions / 8 Answers

    Ask a Question

    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.


    Show 2 more answers Helpful (4)

    Do I need to get a handheld tuner for my car when installing these gears? I have a 2001 auto gt, cai, o/r x pipe and flow masters


    • Hello! You will need a handheld tuner to calibrate your speedometer when the gears are installed.


    Helpful (0)

    I have a stock automatic mach 1, and im looking to get a better querter mile time at the track, with these will I see any difference? Thanks


    • With these gears, you will definitely see a much better launch time and a quicker time overall over the stock gears!


    Helpful (0)

    I have a 2000 gt auto full exhaust/long tubes, x pipe slp lm Cai,78mm tb,24lb injectors,sct x4 custom dyno tune,stage 2 comp cams and resently I got a 2400 stall converter I'm trying to see what to go with either 3.73s or 4.10s


    • It would ultimately depend on what you are looking to achieve out of your Mustang, however, both of those gear sets are very popular. If you were looking for something specific or have particular driving habits, please feel free to give us a call so we may discuss which gear set would be best for your driving habits and your Mustang.


    Helpful (0)

    i'm thinking about going turbo in the near future. i have a automatic 2002 gt and i was wondering if it would be better to keep stock gears or go 3.73 or 4.10


    • The 4.10s are a great upgrade for the turbo set up gets you spooling quicker so the turbo spools quicker which equals power faster, if tuned correctly you would have an amazing set up.


    Helpful (0)

    Do you have to purchase the bearing kit and the installation kit for this product? DO you also need the add LOK traction kit as well? What is the bare minimum i can spend to get everything I need without buying unecesary parts? Do i need all of the recommended products or its not necessary?


    • It is definitely a good idea to get the bearing and installation kit. This kit will replace all the factory washers and bearings that can be heavily worn. You do not necessarily need to get the LOK rebuild kit, though you would definitely benefit from it because you're installing very large gears.


    Helpful (0)

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    Customer Reviews (100+) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.75 4.8
    • Fit 4.942307 4.9

    • 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 (44)

    • 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 (22)

    • 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 (16)

    • 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 (10)

    • 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)

    • 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 (9)

    • 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 (7)

    • 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)

    • 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 (6)

    • 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 (6)

    • 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 (5)

    • 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 (5)

    • 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 (4)

    • 5/5

      Installation Time: Shop Install

      September 15, 2011

      Fantastic Acceleration

      Like it was previously stated, DO NOT FEAR THE GEAR! 4.10s are def NOT too much for 5 spd cars. In my opinion i could go for even a shorter gear. Pick up is excellent and when shifting to the next gear, its so ready to go. No more lag. Anyone who complains that they're too short of a gear and 1st gear is pointless because of spinning, either 1: cant drive and cant throttle a car or 2: needs 2 upgrade tires. If your back and forth between 373s or 4.10s like I was, GO 4.10S NO QUESTION


      Year: 2003 Submodel: GT

      Helpful (4)

    • 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 (4)

    • 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 (4)

    • 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)

    • 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)

    • 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)

    • 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)

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