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Ford Performance Ring Gear and Pinion Kit - 4.10 Gears (05-09 GT)

Item 24002G05
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    Features, Video & Details

    • Ford Racing Quality
    • Strong Forged Construction
    • 4.10 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 2005-2009 GT, Bullitt and GT500 Mustangs

    Review & Installation Video

    Review & Install Video

    I’m Justin with AmericanMuscle.com, and this is our acceleration pack bolt on build up for all 05-09 Mustang GTs. This entire pack has been assembled with one goal in mind, to get our 07 GT off the line much faster. By addressing our gearing, and our grip, we’re actually going to lower our 60 foot times, and improve our overall acceleration, making the car a blast to drive in the process. But before we go over the list of parts we have to install today, let’s get our GT out of the ‘shop and onto the streets and do a baseline 0-60 run, just to see what we’re working with. Before we go installing our acceleration pack here on our 07 GT, we wanted to get the car out of the ‘shop and just do a baseline 0-60 run using our ITSX wireless tuner and my iPad, so there we go, start. Alright so it looks like we just clicked off a 5.5 second baseline run for our 0-60 time. Now we have that out of the way, let’s get our GT back in the shop so we can talk a little bit more about some of the parts we have in store for our GT, and see if we can’t knock that time down a little bit. First let’s talk about gearing, from the factory, our 07 GT came equipped with 3.55 gears, which are great for daily driving, but not the best for all out acceleration. That’s where these Ford Racing 4.10 gears come in, 4.10’s are totally going to wake up our GT off the line, and really give us that low end kick in the pants we’re looking for. That shorter gear ratio means we’ll be rolling through the gears a lot more than we would with our previous setup, so we need to make every shift count. We decided to go with the competition Billet Hurst shifter which it looks like the guys have already installed for us, this shifter should make for quicker, more precise shifts, which will lower our 0-60 time, and make for improved performance overall. Having all the power in the world doesn’t mean anything if you can’t put it down to the ground, and that’s where these next two parts come in. We decided to go with the Exedy Mach 350 Stage 1 clutch to handle the added drivetrain abuse, even though this is only a stage 1, this clutch has been rated to hold up to 450 ft/lbs of torque at the crank, which is more than enough to handle some bolt ons and then some. Besides being able to handle that extra power without breaking a sweat, the pedal feel in this car is only slightly firmer than stock, which won’t wear you out on long trips, or if you get stuck in traffic. Last but not least, we addressed that other very important G word – grip. We opted for BBK’s rear upper and lower control arm set, which should definitely help our GT hook up. Basically, these are going to reduce wheel hop, get us out of the hole a little better, and overall, lower our E.T.s. So now that you know what we have in store for our GT, let’s hand it over to the crew and get the rest of these parts installed, then get it out of the ‘shop and onto the streets so we can take it for a test spin, and do another 0-60 run and see what kind of improvements we made. Alright, so we’re in our 07 GT that we just got done working on, got our acceleration pack installed, and wow! I mean the car just goes now, every time you shift, you’re always in the power band. I love these 4.10’s, man, they’re a lot of fun to drive now. The shifter is working great, a little notchy, but some people like it some people don’t. I for one like it, it makes you feel like you’re actually in gear, kind of hard to miss a gear using this thing. As I was saying, those 3.55’s that the stock Mustang comes with, are probably good for daily driving, I take that back, these gears, the 4.10’s, you stomp on it and you’re going, there’s no downshifting for passing anymore, nothing like that. If it were up to me, I’d have 4.10’s in all of my cars. We haven’t really got to feel the difference that those BBK control arms made yet, just because I haven’t done any hard launches, however, we’re going to take our car back to the shop and do another 0-60 pull, to see if we improved on our time. Alright, now that we have the acceleration pack installed, we did a little driving, car feels great on the street, but now the true test, we’re going for the 0-60 time one more time, using my iPad and our ITSX wireless tuner. So here we go, start. Alright so we just clicked off our second 0-60 run in 5 seconds flat, that’s a half second improvement over our baseline time. Granted, our 07 Gt isn’t completely stock, we do have some basic bolt ons and a tune, but the general idea is just to show you how the acceleration pack is working, and clearly it’s working pretty good. So that does it for the acceleration pack for the 05-09 GT, be sure to check out some of our other bolt on build ups as well, where we dress up our GT a little bit, make it handle a little bit better, and pump up the power.

    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 2005 to 2010 V8 Mustangs including the GT, Bullitt and GT500 models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

    Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please 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: 2005 2006 2007 2008 2009 Details

    MPN# M-4209-88410

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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

    Approximate RPM for 2005-2010 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 4071 5700        
    2 2895 4054 5212 6370    
    3 1947 2726 3505 4284 5063 5841
    4 1264 1770 2276 2782 3287 3793
    5 898 1257 1616 1975 2334 2693
    Will it fit my Mustang?

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        Questions & Answers (26)

        5 Top Rated Questions

        55K mile car... first off, Id like to say that you guys have been the most personal, professional people to deal with, and thank you for that. Ive bought over 3000 dollars of parts from you over 2yrs and recommend you to everyone who askes where I get my parts. Enough said, my question is, Im almost ready to pull the trigger on purchasing 4.10's for my 06 GT and I am wondering, can I just buy the gears only at 179.00? instead of buying all the bearings and special gear oil? Im am very good friends with a ford dealer and have a tech that will do my gears, but I get different opinions from everyone whether I should replace bearings at such little milage on the car. I can get the ford gear oil that belongs in the car, but truely, how much more do I need to spend besides the purchase of the ring and pinion gears? Oh, and one more question, I drive mostly 0-65 on a daily and a few times a month I get on the highway and drive 75mph, and have 3.55's stock now, is 4.10's too low, or will they be a great match for my driving habbits? whats your opinion? I have already purchased a tuner and jlt cold air intake, with slp loudmouth exhaust, and am afraid that 3.73's wouldnt make such a big difference, thats why Im focused on 4.10's....

        • Thank you for thinking so highly of us! We love to hear positive feedback from our customers! You are correct in thinking that upgrading from 3.55 to 3.73 won't give you as much of an impact as you're after. You will definitely notice the get up and go of upgrading to the 4.10's over your stock 3.55s though! I would suggest sticking with the 4.10's; anything steeper and you would really start to see the effects on your gas mileage, etc.. Even if you were to start doing more highway driving with the 4.10's installed, you would not notice much of a decrease in mpg, which is always a good thing! In regards to the installation and bearing kit, I HIGHLY recommend you replace those as well. Cars with over 30,000 miles have bearings that are worn to the gears. Replacing all the worn out bearings, shims, etc... when installing new gears will prolong the life of your gears and will prevent any future problems. If a bearing goes bad down the road, you may end up having to replace the bearing and whatever else that bad bearing damaged as well. It's a great preventative measure for a potential giant headache. Changing your gears will also cause your speedometer to read incorrectly. If your have an automatic, it could also cause your shift points to be incorrect as well. Best way to correct that issue is to get a new custom tune for the car. If you have a tuner with AM/Bama, you have Free Tunes for Life and can just get the tune updated for the new gears. If you don't have a tuner, we do offer a kit that includes the gears, a handheld tuner, the rear end installation and bearing kit as well as the necessary gear oil to complete the job! I have attached the kit below if you'd like to take a look! I completely understand that $179.99 for gears along seems like the easier way to go about this upgrade, but if you want to do the job the best and most efficient way the first time around, I couldn't recommend the gear combo kit more! Any other questions, please give us a call! We'd be glad to help!

        Helpful (4) Show 3 more answers

        Will a100 shot of nitrous work well with 4.10s? My 06 gt is basically stock and was thinking about getting both. Will this harm the engine when nitrous is used because of 4.10s higher rpm?

        • cowboytriplets: Nitrous will work well with just about any gear ratio, it's been my experience that with 4:10 gears the tires want to bust loose when you use the shot right out of the hole. My advice is to look at getting a nitrous programmer that will ease into it down the track, otherwise you're gonna be melting tires off the line depending on your shot for example a 75 shot will probably be fine but a 150 shot is almost guranteed to bust them loose. Either way you're going to love the new found seat of pants power you'll feel from the 4:10's. Have fun buddy :)

        Helpful (2) Show 5 more answers

        Can I put this on my 05 v8 automatic?

        • Yes, this gear kit will work with all 05-09 Mustang GT models equipped with either the manual or automatic transmission.

        Helpful (1)

        Are 4.10's safe to use with the factory 2-piece driveshaft?

        • Lord yeah they are!! I drive mine daily, more closer to redline than normal, and they have held up tremendously to every bolt-on I have!!! Mines an 06 gt just 120k and the 4.10's are the best mod I have! Just get some soft-wide tires and you'll hook! Also the downside (for some people, I don't mind) is that going with a gear that large it will have a slight roar compared to factory! But install a loud exhaust or turn the music up and you're good!!!

        Helpful (1) Show 4 more answers

        What is the difference in the 4:10 gears and the 4:11 gears as far as performance? Which is better?

        • Essentially the 4.10 and 4.11 gears will be the same as far as performance goes.

        Helpful (0)
        10 More Questions
        What type of oil should be used with these gears in combination with the motive install kit and Torsen differential? 1 answer
        Are 4:10 grears in an 01 gt w/auto trans ca smog legal? 1 answer
        Will these increase my my real wheel horse power number? But keep the crank the same? 1 answer
        In some older Mustangs like, an old 98 I had, you had to have a shaved pin due to clearance issues. Is this the case for these or are the the newer design where i can use the factory pin without modification? 2008 Mustang GT with factory 3.55s 1 answer
        Do I need the suggestions that go along with the gears, do other people buy them, what do they do , Is the installation easier, should I buy them 1 answer
        Will these gears work well with my v6 mustang (2006) 1 answer
        After these are installed how do you fix the speedometer if you do not have a tuner? Will the speedometer always get messed up when installing new gears? 1 answer
        I've got a 2009 Bullitt. It currently has 3.73 gears stock. I am thinking of moving up to the 4.10 gearing to give it that extra push in the low end and give it more in acceleration. However, when the weather permits, this car is my daily driver. So I am worried that the gas mileage loss would be significant, or the noise from the heightened revs on the freeway will hinder me from wanting me to drive it on a daily basis. Should I stay with the stock 3.73 gears, or is it worth it in my situation to up grade to the 4.10? 1 answer
        I got my current Mustang over the summer in June with only 15k miles. It's a manual and basically stock, with the exception of a few bolt-ons and exhaust. I know I want new gears for the next mod, but I've heard mixed opinions on whether to go 3.73s or 4.10s. I've been leaning towards 4.10s, but I'm wondering how bad it will affect gas mileage and how steep the gears really are? I've heard that 3.73s are "the perfect in between," but I don't know if they will really give it all that much of a performance increase. Any input would be greatly appreciated! 1 answer
        Recommend change Gears on a AT I have a 09 GT automatic and considering upgrading my gears. Would it be recommended for a street car? I don't go out to the track. 3 answers

          Customer Reviews (100+) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$250-$500

          • Performance Gain 4.767442 4.8
          • Fit 4.905882 4.9



          • 5/5

            June 02, 2019

            4:10 gears

            Great product, everything as described. Shipping was fast with no problems

            Jmccombs46

            Year: 2006 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            May 13, 2019

            4.10’s are a must!!

            My fbo, cam, and tune GT pulls even harder with this gears! Highly recommended!

            OBJ

            Year: 2008 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Full Day

            May 01, 2019

            4:10 gears

            First of all I like to say awesome gears much better than the stock gears. The game is pretty good don't expect it to be like a supercharger but it is still pretty awesome. I recommend if this is the first time you doing it get some help or go to a shop.The only thing you have to watch out for is if it's shimmed right.

            Bhupi

            Year: 2007 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            April 08, 2019

            REAR GEAR UPGRADE

            NICE GEAR SET, MUSTANG PULLS LIKE A CLYDESDALE NOW, BIG BANG FOR THE BUCK.

            HELLCATHANDLER

            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            April 03, 2019

            The Best

            I’ve been a professional gear installer for over 30 years and I always recommend ford racing gears. Easy to read pattern and very quiet gears. Takes me about 4 hours on a gear swap. JohnnyGearz

            JohnnyGearz

            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            April 02, 2019

            Excellent Upgrade

            Fantastic upgrade over the stock gears. Instant power to the wheels. Give these new gears around 500 miles of easy driving (hard to do but worth it) and you'll have no gear whine. Had a great shop install these and a master bearing kit. You'll need a tune to correct the speedo.

            InspiredMotorsp

            Year: 2007 Submodel: GT

            Helpful (0)

          • 5/5

            March 07, 2019

            Great gears Love them

            Best choice I’ve made is moving up to a 4.10 from the 3.31s I had in the car Night and day difference definitely picked up a lot down low and really kicks

            JoseA

            Year: 2007 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Afternoon

            March 02, 2019

            A must have for your mustang GT.

            Car runs allot better with these. Nothing more nothing less.

            devilpupvega

            Year: 2006 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Shop Install

            February 22, 2019

            Perfect gears for 3V Modular Mustang

            Smooth quiet running gear and much better ratio than stock if you are deciding between 3.73 or 4.10 go with 4.10 and the rpm only went up 200 from stock

            PatrickP

            Year: 2010 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $500-$1000

            October 06, 2018

            Awesome gears

            Great performance improvement compared to the stock gears. The acceleration improvement is very noticeable. Don't forget through that your speedometer will be off with the new ratio.

            Xwng13

            Year: 2006 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Full Day

            September 25, 2018

            From gears

            Very good quality ,and performs great.all together it took me the day to install at home.

            wildwilly

            Year: 2008 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            September 10, 2018

            Great product

            Woke up the car!! Fast shipping and cheapest around

            CheeL

            Year: 2008 Submodel: GT500

            Helpful (3)

          • 5/5

            June 25, 2018

            Works great!

            Works great! Really changed the characteristics of the car. Ford should have offered these as an option from the factory.

            TravisO

            Year: 2005 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Full Day

            May 26, 2018

            Dont fear the gear

            Switched from 3,73 to 4,10 gears and it's such a big improvement over the 73's with a na 4.6 they are the best gear

            DanielO

            Year: 2007 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            April 02, 2018

            A must do mod

            4.10 are a must for mustangs, makes a huge difference

            CristianR

            Year: 2007 Submodel: GT

            Helpful (6)

          • 5/5

            November 08, 2017

            worth it!

            the most fun for the buck for street driving. you'll need slicks for any kind of dragway traction

            GaryV

            Year: 2008 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Full Day

            October 14, 2017

            ACCELERATION!

            Comes out of the hole like a freaking champ now. Had some trouble getting the old parts off the car but once they were out it was smooth sailing.

            DC

            Year: 2016 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            August 29, 2017

            Rocket Ship

            I installed these with the Hurst performance shifter , what a difference over stock. The car moves, if you can afford both , do it.

            Rob90

            Year: 2005 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            August 04, 2017

            Bring your car to life !!!...

            not recommended for daily hwy/Interstates use... these are City Cruz.n and intended for Track Use with 28-29" drag radials or slicks to put the power to the ground !!!... (you will Light up Summer tires like they are going outta style)

            AdamH

            Year: 2007 Submodel: GT

            Helpful (10)

          • 3/5

            Installation Time: Weekend

            June 27, 2017

            Noisy

            Great performance gain but quite noisy; had the carrier in and out about 7 times and still get a "gurgle" when coming to stop and a whine at 70kmph.

            Twitchfsj

            Year: 2008 Submodel: GT

            Helpful (6)

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