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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-4209-88410

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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 AmericanMuscle.com, 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


    Manual
    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


    Automatic
    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
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    19 Questions / 7 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?

    MoeAli

    • 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.

      Wildhorse1

    Show 2 more answers Helpful (4)

    Ok so I have a 5 speed 2000 mustang GT with 3:55s and I originally wanted 4:10s but my mechanic said that they’re only good for strip use, that for daily driving they are too steep. He also said the steeper the gear the more vibration you’ll feel in the driveshaft. I thought about getting 3:73s but is it worth it? As it’s not much of a jump from 3:55s. I want taller gears, I’m not happy with 3:55s. What gears will go good with my other mods? I have CAI, airaid throttle body spacer, Pypes O/R H, magnaflow street catback all tuned with a 93 race tune from a Diablosport I2 tuner. I also have a centerforce clutch, and 275 wide Nitto tires in the back. I don’t want 3:90 gears as they are not made by Ford Performance.

    BrunoR

    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

    TonyL

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

      VincentV

    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

    Wes

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

      Ricky36

    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

    AdelfoS

    • 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.

      AMJEFF

    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

    AndrewD

    • 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.

      AMwhitecobraadam

    Helpful (0)

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.759259 4.8
    • Fit 4.944445 4.9



    • 5/5

      Installation Time: Afternoon

      April 04, 2018

      4.10 THE BEST

      If you're looking to swap the rear end go for the 4.10 gear ratio. Also buy the installation kit and change everything at once

      MustangDubai

      Year: 2004 Submodel: GT

      Helpful (1)

    • 5/5

      February 05, 2018

      4.10 gears for my 03 gt manual

      Worth every single penny. If you are staying n/a 4.10s are the only way to go. Car chirps 3rd every time. Do not fear the gear. 5th gear on the highway is fine with 4.10s anything up to 80mph is still under 3k rpm. If you are going to supercharge your stang I'd drop to 3.73 so you can use the power band more. Overall any mustang n/a should have 4.10s. 2003 mustang gt 5 speed, 4.10 gears, tune, intake.

      EzraG

      Year: 2003 Submodel: GT

      Helpful (9)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      December 22, 2017

      4.10s

      These gears really wake the car up. You gain so much acceleration with these gears. These along with longtubes and intake are the way to go!

      2002GT

      Year: 2002 Submodel: GT

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      November 23, 2017

      4.10 Ford Performance

      Simple install, noticeable difference at launch. This is a lot of bang for your buck.

      BlakeB

      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      July 10, 2017

      Getting geared up

      Perfect gear for auto NA. Car is even more of an animal then before. Gas mileage suffered due to being unable to keep my foot off the throttle. Great bang for the buck.

      MachMike

      Year: 2003 Submodel: Mach 1

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      June 25, 2017

      Crazy Increase In Throttle Response!

      Paid a shop to install the kit and it was the best thing that i did to my mustang!

      Bret

      Year: 2015 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Full Day

      June 16, 2017

      Perfect gears

      These gears are nothing short of amazing! Ford racing gears always set up easily and don't make any noise. AM shipped quickly and packaged nicely. I wouldn't recommend the install unless you have the necessary tools and a shop press.

      Luketich98GT

      Year: 1998 Submodel: GT

      Helpful (3)

    • 5/5

      June 13, 2017

      Got to have it

      Definitely got a have item acceleration improvement will recommend it for all drag cars out there..

      GustavoC

      Year: 2003 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      May 20, 2017

      Perfect gear for mustang

      I went from 3.73 to 4.10 and couldn't be happier. These gears are perfect for a automatic mustang.

      GTjonnie

      Year: 2001 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Weekend

      May 05, 2017

      Time consuming but worth it!

      Honestly took me about a week to install (had to drive around for tools and other parts at the last minute plus i took my time with it and it was a full rebuild with new driveshaft u joints) your going to want at least a 12 ton press for the bearings. But because they were from Ford they went in with very little adjustment needed. Installed these with the high torque ford racing pinion bearings and new trak-lok rebuild kit new carrier and axle bearings and new seals and got me a Ford racing diff cover! looks and feels great! make sure you get your pinion pre-load and backlash readings correct otherwise things can go very bad.

      MVFast02V6

      Year: 2002 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      April 03, 2017

      4.10 Mach 1

      Must Have!! Really wakes the Mach up! Pulls hard! Highly recommend!

      TorchdMach

      Year: 2004 Submodel: Mach 1

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      March 21, 2017

      good investment

      I replace my stock gears with a sale Ford Racing 410 gears I instantly felt greater acceleration and firmer shifts I cruise about 85 and right under 3000rpm highly recommend buying a tuner to get full potential

      dpullin956

      Year: 2003 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      March 13, 2017

      Instant difference!

      I give the gears five stars because it's an instant upgrade. I can definitely feel the difference in acceleration and throttle response.

      Rel29

      Year: 2000 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      January 07, 2017

      Best bang for your buck mod!!!!!

      Went from the stock 3.27 gear to the 4.10 gear in my daily driver. Also went with the frpp 31spline differential and Moser axles. All I can say is what a setup! The car pulls so much better and has much more torque to pull with than before. Second gear pulls are so much fun with this gear. Best mod without breaking open the valve covers. I was debating between the 3.73 and the 4.10 gear. Im glad i chose the 4.10. Don't fear the gear!

      LTHL281

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      August 23, 2016

      4:10 Gears

      I love the different feel that I get when I floor it from a dead stop and also when I need to get through traffic on the highway!

      TeJones

      Year: 2001 Submodel: GT

      Helpful (2)

    • 5/5

      August 16, 2016

      This is a must

      I had the 4.10 gears instslled a few weeks ago in my 04 Mach 1 and I could not be happier. Going from 3.55 to these was a nice change. These gears definitely woke my car up. I highly recommend these gears for the Mach 1.

      JM

      Year: 2004 Submodel: Mach 1

      Helpful (2)

    • 5/5

      July 30, 2016

      Beast!!

      Im realy enjoing it. It realy woke the 2V up!! Now with the 4.10 it feels like a race car!!

      Pedro

      Year: 2001 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Full Day

      April 01, 2016

      WOW

      My 2000 Manual was lacking some ummf!!! The 410 gear was a big inprovement, If you have a stick you will go thourgh gears (shifting) like crazy. But, The power is a big up grade!!

      Blbuggs

      Year: 2000 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Weekend

      April 07, 2015

      About as low as you can go with a street car

      Purchased the 4.10 with full bearing kit, and the limited slip rebuild pack. Install was rather difficult; it was my first time doing gears and I had an experienced mechanic to guide me and a shop with a lift to make things a bit easier, but it still took about 15 hours. I would NOT recommend doing this install yourself unless you have previous experience or lots of extra time and a decent shop. One thing to note, the bearings are impossible to install without a press. So the install was a pain, but the end result was quite worth it. I have the 4.6 SOHC and i'm sure i'm not the only one disappointed in the bottom end these motors have considering they're V-8's. The stock 3.27's really accentuate this issue, and almost beg you to speed just to get into the power-band and really appreciate the power. (The TR-3650 5-speed is better then the autos, but still does 65 MPH at the top of 2nd gear, which would be speeding anywhere but the inter-state) That said, these 4.10's solve this quite nicely. More power is felt in every gear, primarily 5th (I noticed alot of extra "umph" out of 2nd as well, as it can easily be used to initiate and maintain a slide now, whereas before it would bog too low and lose wheel spin). The primary downside is obviously the top end speed in each gear. With stock gearing, 3rd gear could blast you right past 100 MPH and carry up to 105 or so before 4th was needed, now though, 80 is about the best that 3rd can do. From a drag racing standpoint, the acceleration is improved, but more shifts are required and depending on how long your strip is those shifts might hurt the overall time if you're not fast with them. I'm more of a drifter/autocrosser and for that these are a must. Corner exit power is phenomonally improved, and as mentioned before, the ability to maintain a slide is also significantly improved. From an MPG standpoint, things are not much different in town, but 5th now sits around 2050 RPM at 65 MPH where before it was closer to 1650, so this would obviously effect highway MPG's a bit (unfortunately I have no numbers yet). The LSD rebuild is very easy to do in comparison to the rear-end bearings, and can be done pretty easily with basic tools. It comes with a fatter "S-spring" then stock that was designed for more holding power in the Cobra. Most instructions say to re-use the old spring, but I crammed the new one in and it works great. My old diff was chirping and clunking when manuevering into parking spots and the like, but now it's perfectly quiet and glides around effortlessly, but as soon as you lay into the throttle, it doesn't even feel like a differential, just a solid connection between the two back tires. Couldn't be happier with it :)

      Silverstang41

      Year: 2003 Submodel: GT Box Elder, SD

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      August 21, 2014

      Great gear for the 01' AT GT

      Had them installed in my 2001 GT (auto) for $500 dollars, this price was for traction lok rebuild and also getting my subframe connectors welded on as well. Awesome price. Well as if traction wasn't already an issue, fresh tires and these gears and now I have even bigger issues, but I like it. The car is a whole new animal now, it's the perfect gear for an auto, unless you drive a lot on the freeway or nail the throttle a lot you'd never know it had gears in it really. very mild mannered. I have yet to race/E.T. it as far as gains but as the saying goes "Don't Fear the Gear"

      VampireRX

      Year: 2001 Submodel: GT Queen Creek, AZ, USA

      Helpful (4)

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