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Ford Racing 4.10 Gears (05-09 GT)

100+ Reviews
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  • Item #24002G05
  • MPN# M-4209-G410A

  • Market Price $173.99
  • You Save 17% ($29.01)
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  • 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
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

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

Approximate RPM for 2005-2010 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 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?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09
  • GT500 - 07, 08, 09

Most Helpful Reviews

4.10s #1 mod for an auto

I have an 06 gt stock. I picked up my car yesterday with the 4.10s and oh my God. The acceleration is wicked now. I don't have to mash the pedal to the floor for great acceleration any longer, wither. ...

Read More
Helpful (30)

bogging all gone!

do you have a automatic? are you tired of the sluggish throttle response off the line?Then these gears are perfect for you! For the money this is a very good option for making your mustang a lot more fun ...

Read More
Helpful (21)

Read All 100+ Reviews
Overall Rating 4.9 out of 5 stars


I’m Justin with, 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 View Full Transcript

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17 Questions / 8 Answers

Ask a Question

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....

newimage2 Year: 2006 Model: GT

  • 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!

    Best Answer

    LisaS Year: 1992 Model: GT

    Good Answer (1) (0)

Show 3 more answers Question Resolved

instalation and bearing kit for gears.. Ive been asked what is included in the instalation and bearing kit for the 4.10 gears you offer. does it include everything Ill possibly need to replace the ring and pinion gears? Ill have access to the gear oil from ford as a ford dealer would be the ones installing them. does it come with shims as well? Thanks for your help with this purchase!!

newimage2 Year: 2006 Model: GT

  • Our Rear End Installation and Bearing Kit (sold separately from the ring and pinion unless bought as a set) contains all the bearings and shims needed to complete a gear swap install and comes with the following: Front & Rear Pinion Bearing Pinion Seal Carrier Bearings Carrier Shims Differential Bearings Crush Sleeve Pinion Nut Cover Gasket Ring Gear Bolts Brush Gear Marking Compound Loctite I've attached the link below so you can take a further look if you'd like!

    LisaS Year: 1992 Model: GT

    Good Answer (1) (0)

Show 2 more answers Question Resolved

will my sct programer work for gear swap Am set up my programmer for my cai and throttle body swap. Will I need another tune or can my programmer set me up for new rear end as is

bodaddy Year: 2007 Model: GT

  • Call bama and get the tune from them. You will need it.

    Tomselzcarz Year: 2009 Model: GT Top 250 Contributor

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

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Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.786885 4.8
  • Fit 4.95 5.0
  • Bang For Your Buck 4.901639 4.9

  • 5/5

    April 20, 2011

    4.10s #1 mod for an auto

    I have an 06 gt stock. I picked up my car yesterday with the 4.10s and oh my God. The acceleration is wicked now. I don't have to mash the pedal to the floor for great acceleration any longer, wither. If you're worried about the higher rpm, don't be, the difference is minimal. And my gas mileage around the city is going up. You'll not find any mod in this price range that will come close to add the performance these gears will. Buy them! You'll thank me!


    Year: 2006 Model: GT Driving Style: Daily Driver

    Helpful (30) (0)

  • 5/5

    April 01, 2011

    bogging all gone!

    do you have a automatic? are you tired of the sluggish throttle response off the line?Then these gears are perfect for you! For the money this is a very good option for making your mustang a lot more fun to drive. I hated how sluggish my mustang was out of the hole, but theses gears really wake up a automatic gt


    Year: 2005 Model: GT Driving Style: Show

    Helpful (21) (0)

  • 5/5

    Installation Time: Full Day

    August 13, 2012

    Rude and Right

    I have installed these gears in my 09 GT 5 Speed. As always, 4:10's are the gear to have in one of these cars. 1st Gear just RIPS THE TIRES OFF THE RIMS, Second pulls like a FREIGHT TRAIN, then you have the other 3 gears for CRUSHING the COMPETION!!!! Combined with the JLT Cold Air Intake, Bama Tuner, Pypes X Pipe, and Pypes Pipe Bomb Catback Exhaust this car is DOWNRIGHT RUDE on the Street. What we have here is a 12 second 1/4 miler with A/C and a Shacker Sound System, totaly Street Legal, and 18 miles per gallon. How Cool is That!!!!?????

    Top 250 Contributor


    Year: 2009 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Rochester NY

    Helpful (16) (0)

  • 5/5

    July 01, 2010

    2008 GT/CS

    i have numerous bolt-ons but the 4.10's are by far my best investment. It wakes up your car when you want it to but isn's too much for a daily driver. The description claims to reduce your gas mileage but mine increased somehow, which makes no sense considering i accelerate a lot faster and a lot more often. I recommend having them installed by a shop. i have a buddy who is a mechanic and he had trouble doing some at his work and had to call over help. The highway driving isn't bad. The car will hum a lot louder on the highway but if you punch it'll throw you back. First gear is pretty powerful, Second is great, and once you hit third at full throttle you are happy you bought them! I strongly recommend these especially if you want to mess around with other mustangs because they just cant keep up once you have the new gears.

    Matt Stieg

    Year: 2008 Model: GT

    Helpful (18) (2)

  • 5/5

    Installation Time: Full Day

    August 12, 2013

    Skeptical at first, now a believer

    I commute 70+ miles a day on fast SoCal freeways. I wanted more "fun" factor for my car. After all the usual bolt ons (90 mm CAI, 62mm TBI, CMC deletes, exhaust, shorty headers, cat delete, alum drivetrain, HotRod cams) I decided to lower the gears. I did the work myself- highly recommend dropping the whole rear end to work on if you don't have a lift. I found it much easier to work with the rear end on jack stands in the garage than upside down under the car, as there is a LOT of fitment and install details. I was afraid of the drop in mileage as commuting is a fact of life for me. I will say- I did drop 3+ mpg moving from my 3.55 to the 4.10---- with that said--- it was worth it to me. I still get around 21mpg average. We all got these cars not because they are the most practical. They are not the most fuel efficient. We got them because we wanted to have some fun along the way. We wanted to impress our friends, turn a few heads, and feel the rush of speed and torque. Our cars make horsepower, but at a higher rpm... We peak around 5800-- these gears help get you into the peak RPM band faster. I cruise at 80-ish mph commuting and engine sits at 2600 rpm. I used to be at 2100 rpm in my 3.55's. These gears have helped me beat my coworker's twin turbo'ed BMW. He was shocked when a few weeks ago he's pull me, but now, I can leave him, and my engine still has plenty of RPMs left. In short- if you remember to have fun, these gears are absolutely the way to go. In traffic, at speed, or in the city- these gears are fun! If you are more concerned about mileage- get a hybrid!

    Top 1000 Contributor


    Year: 2007 Model: Other Driving Style: Daily Driver 'Stangs I have owned: 1 San Diego, CA, USA

    Helpful (14) (2)

  • 5/5

    Installation Time: Shop Install

    October 22, 2011

    Should have been the first mod!

    I wish i would have done this mod first, it really gets the stang up and moving. I feel like when i am driving down the road i am always at a perfect rpm. Sounds good driving 30 mph with my exhaust! You will for sure not regret them, I was up in the air with 3.73 vs 4.10 and i am positive i made the right decision! Going from a roll in 1, 2, or 3rd gear it gets up and scoots! I have CAI and full exhaust, with these i feel i get beat most cars! gas mileage? i have never calculated, because who can stay out of the gas pedal for a whole tank? GET THEM!


    Year: 2009 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Manhattan, KS

    Helpful (10) (0)

  • 5/5

    December 08, 2008

    Get some Drag Radials

    Really improves acceleration 0-100. No more lag at the bottom of third and fourth gear. The car will top out now at 110 though and 5th is good for cruising, but will not pull hard once you have topped out 4th. Overall, great for in town racing and the strip, not good for high speed top-speed highway runs. It will also magnify any traction issues you are already having, so the drag radials are going on next!


    Helpful (10) (1)

  • 4/5

    December 06, 2010

    Had both 3.73 and 4.10's

    Well to start off, these will def. help your acceleration. Im thinking I will go back to the 3.73's because top end is totally lost and at 70 im running 2500rpm+ with these and mpg was def. noticeable with these 4.10's, but they are fun in the city...there just not that great on the highway...probably helps also if you have a 6spd and not a 5 like mine. Cheers!


    Driving Style: Daily Driver

    Helpful (7) (0)

  • 5/5

    March 31, 2009


    Just had mine put on, big differnce when hitting the gas in first gear, u can break the tires with no clutch and when shifting to 2nd, break em again halfway through 2nd. Driving 40 mph roll and hitting the floor, you dont see a huge improvement, more from a dead stop... great purchase, glad i went with 4.10 over 3.73


    Helpful (7) (0)

  • 5/5

    August 16, 2008

    Don't Fear the Gear

    Just as the title says. I was afraid at first to put such a steep gear into my daily driver (05 GT). After the install no regrets what-so-ever. 80 mph 3k, 70 mph 2600 rpm. This should be the very first mod to every mustang period. Thanks American Muscle!


    Year: 2005 Model: GT

    Helpful (7) (0)

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