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Ford Performance 4.10 Gears and Install Kit (86-09 V8)

Market Price $319.99 You Save 19% ($60.00)

$259.99 (kit)

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  • Item 100577
  • MPN# 100577

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Features & Details

  • Money Saving Combo Kit
  • Ford Racing 4.10 Gears - 8.8"
  • Motive 8.8" Rear End Installation and Bearing Kit
  • 1 Bottle of Ford Racing Friction Modifier
  • 2 Quarts of Royal Purple Max Gear 75w90 Gear Oil
  • Fits 1986-2009 V8 with 8.8" Solid Rear Axle
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. This Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, 1 bottle of Friction Modifier, 2 bottles of 75w90 Gear Oil, gaskets, seals, shims, bearings and all the required hardware.

Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Speedometer Gear, a Ford Racing Speedometer Recalibration Tool or a Bama SF4/X4 Power Flash Tuner is a quick and easy way to fix this issue.

Application. This Ford Racing 4.10 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 1986-2009 GT, Bullitt, Mach 1, Shelby GT500 and 1994-1998 SVT Cobra. It will not fit the 1999-2004 IRS equipped Cobra Mustangs.

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: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
  • (1) 3.8 fluid oz bottle of Friction Modifier
  • (2) one quart bottle of Royal Purple Max Gear 75w90 Gear Oil
  • 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
Installation Info
Will it fit my Mustang?
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Cobra - 93, 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
  • Bullitt - 01, 08, 09
  • Mach 1 - 03, 04
  • GT500 - 07, 08, 09

Most Helpful Reviews

5/5
Ford Racing 4.10 Gears

My '07 GT/CS came with 3.55s in the 5 speed. No brainer mod here! 2-3rd gear pull HARD now. I can actually accelerate in 5th too. Great mod. Should be #1 on your list unless you have a SC. Hands down, ...

Read More
Helpful (1)

5/5
Kick in the seat upgrade!

Just got these installed on my 2004 GT. Car pulls so much harder, and is way more fun to drive. I'm turning 2500rpm at 75mph. Still has good street manners. I also rebuilt the limited slip with the Carbon ...

Read More
Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 70 Reviews

Customer Photos (11) Submit Your Photo

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13 Questions / 10 Answers

Ask a Question

will i have to update my tune through bama whenever i install these new gears? i have a bama tune and am wondering if i will have to email them requesting a tune upon installation.

Zack06gt

  • Yes - for those with 1999+ V8 Mustangs, you will want to let our Bama team know that you have upgraded your gear ratio. They can add that to your tune information, which will correct your speedometer reading. Hope this helps!

    LisaS

    Good Answer (1) (0)

Show 1 more answer Question Resolved

4.10 fuel mileage How much of an effect does it make on the fuel mileage in an05 GT mustang to go from 3.23.to 4.10's with an automatic

BeauandStacisGT

  • 10-20%. If you are worried about fuel mileage, don't do it. But if you want your Mustang to perform better, change the gears.

    88GTConvertible

    Good Answer (2) (0)

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Is there a way that I can get this kit w/4.30 gears?

James

  • Yes. Please ask AM to order you the 4.30 gear set from FORD for you as a special order. Not cheap. FORD part number: FOR10.5-430-31 Just stick with Ford Racing with which ever set you decide to get.

    Robb10

    Good Answer (0) (0)

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Fit I want to be sure that fit on my svt cobra 99? The ford dealer said its the same for a svt cobra 99 that a gt v8. But you write on the fit spec that not fit there??? I want buy a 4.10 kit gear now

Stephan99svt

  • You have a 8.8 inch rear all your doing is changing the ring and pinion and bearings and oil. When the rear is set up it is different each time with the shimming to get the proper back lash. Unless you have the tool to do this take it to a go shop and have it done. 400 to 500 dollars.

    fasteddie64

    Good Answer (2) (0)

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too speed I wanted to know how everybodies top speed was if its like 5 mph lower thats fine

Yetismustang

  • Adding the new gears will most likely drop your top speed 10-20 mph. You'll certainly get to your top speed quicker, but if you still want a reasonable number, you might want to consider the 3:73 or 3:55 gears, especially if it is a daily driver.

    BandiPat92

    Good Answer (1) (1)

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The kit comes with 75w-90 oil and on the rear end cover of my 2004 GT it says to use 75w-140 oil only ??

Grampstoy

  • That is the manufacturer OEM oil weight much like oil (5w20). The oil included will still work fine its just a little thicker/thinner than oem.

    jonnyb8891

    Good Answer (1) (0)

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Customer Reviews (70) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.775862 4.8
  • Fit 4.913793 4.9



  • 5/5

    September 29, 2016

    Great product. Great price.

    This kit has everything you need and will not disappoint if installed correctly. Go on any forum and ask what a great mod for your mustang is and everyone says, "re-end gears". Holy cow are those people right. If you're on the fence about it take my advice and buy it. Check your options. 4.10s are very short, you'll be in 5th everywhere you go but I believe 4.10s are perfect if you daily your weekend drag car.

    mrcarguy

    Year: 1995 Submodel: GT

    Helpful (1) (0)

  • 5/5

    September 14, 2016

    4.10 gear and rebuild kit with limited slip

    Complete kit I also bought limited slip rebuild kit ( trac lock). I had to leave a steel disc out on each side to get spider gears in. If you are using Jack stands to raise car I think it is easier to remove the entire rear end then disassemble. Mach1 is quicker and spins both rear wheels.

    Mach103

    Year: 2003 Submodel: Mach 1

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    June 09, 2016

    Brace Yourself

    Switched the stock 3.23 gears to 4.10 gears and (LOK system) will make you sit up in your seat. I am running P295/35/18's on a 99 S/C SALEEN 14 psi. It will bark the tires in fourth gear. All challengers are welcome to test me. Outstanding setup... Don't fear the gear.... OH I FORGOT IF YOU ARE IN THE NEW YORK AREA YOU WILL NOT BE ABLE TO SEE ME BUT YOU WILL HEAR ME!!!! LOL...

    Speedracer

    Year: 1999 Submodel: Other

    Helpful (1) (0)

  • 5/5

    Installation Time: Weekend

    September 14, 2015

    Kick in the seat upgrade!

    Just got these installed on my 2004 GT. Car pulls so much harder, and is way more fun to drive. I'm turning 2500rpm at 75mph. Still has good street manners. I also rebuilt the limited slip with the Carbon fiber friction disc kit. Now both tires hook up, and go! Very happy with this upgrade! If your on the fence about which gears to get between 3.73 and 4.10, and you plan on staying N.A. go with 4.10! You won't be disappointed!

    phatspeed7x

    Submodel: GT Pengilly, MN

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    March 11, 2015

    Ford Racing 4.10 Gears

    I was hesitant to by 4.10 gears because several people told me this ratio was too steep and increases RPM too much. Wrong! American Muscle was right to recommend this performance upgrade. Acceleration is better at any speed, take off from a stop is easier, amount of shifting about the same, and RPM only increase by 500 at 80 mph. Professional install required to get gear spacing right at a cost of about $350, but it's worth the money.

    RoushSport

    Year: 2009 Submodel: GT Houston, TX

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    February 12, 2015

    Gear up for great Gains!

    Just literally got home after a full day in the shop. Added several things but I will focus on the Gears at Hand! I replaced the 3.37 Stock gears in my 08 GT WELL WELL WELL, I didn't know I was driving a race car until I drove home 63.3 miles... First gear is quick, second hold on to something, third vapor trail!!! I was shocked at how well this one simple swap make such a impact on my car! If you don't have 4.10's in your GT, you really should just get a Smart Car, cause I was really DUMB not to do this a few years ago!!! AM always does it right, orders are easy, the guy and gals all know there stuff! You will thank me if you pull the trigger on these gears... Highway speeds, I left this morning checked RPM @ 80 was about 2100-2200, that was the stock 3.37 on the way home with the 4.10 @ 80 RPM was just under 3000 more like 2800/2900 I can live with that! Didnt try to fun it much over since I replaced gears and differential..

    WangBangSweetMustang

    Year: 2008 Submodel: GT McAllen, TX

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    September 09, 2014

    I was on the fence as well....DONT BE

    I have a 2000 Mustang GT with a T5 trans. I was on the fence for quite some time, reading every review I could find on google that was 3.73 vs 4.10 gears. Reviews were split for a while. Then I started to notice people would say in 5th there would only be a 300ish rpm difference. So 4.10's it was (plus sooo many posts about people regretting going 4.10's) Let me tell you, I am SOO HAPPY I decided on 4.10s. I cruise in 5th going 70 at 2600 rpms. My daily commute to work is about 5 miles city & 10 highway. I love it. People have said 1st gear is not usable... That is not true at all. I still use 1st gear after every stop. Is it short ? Yep. But its not like you cant use it at all. Man oh man does she pull through EVERY gear now. I have a mostly stock 2000 gt. (CAI, Tune, O/R Hpipe, Flows) are the only power adders. I used my bama tuner (great guys btw) and calibrated my speedo as soon as the shop was done. Off I went. I bought these and the TLOK rebuild (car has 80k on it). The shop did both at the same time for $ 329.75. I have ZERO whine. Just make sure the tech knows what he is doing. Anyway, I hope this helps someone on the fence in the future. It really woke my stang up. Feels like I have ALOT more power. You have heard it before and I am sure you will hear it again, but do NOT fear the gear !

    jcrawford21

    Year: 2000 Submodel: GT KS

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    June 20, 2014

    01 GT Convertible

    Had a local shop install the 4.10 gears and M.M. Subfame connectors (must have) in the same day. I didn't get the full effect of the gears until I received my bama tuner 3 days later. My stang feels much faster and shifts way better then before. If you own a convertible GT get the 4.10 gears and don't bother with the 3.73

    Gojo84

    Year: 2001 Submodel: GT Pasco, WA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 20, 2014

    Ford Racing 4.10 Gears

    My '07 GT/CS came with 3.55s in the 5 speed. No brainer mod here! 2-3rd gear pull HARD now. I can actually accelerate in 5th too. Great mod. Should be #1 on your list unless you have a SC. Hands down, forget the 3.73...

    billymack07gtcs

    Year: 2007 Submodel: Other Mount Airy, NC, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    December 20, 2013

    best performance for under $500

    Found a major difference in accel! Went from a 3.27 rear gear to 4.10 and ill say, its the best upgrade for building on a budget or a purpose built car like mine for road racing!

    autox96cobra

    Year: 1996 Submodel: Cobra Pryor Creek, OK 74361, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    December 21, 2013

    Perfect gear for 0-60 badassery!

    This has to be the perfect gear for the S197, as it pulls super hard in all gears but still allows for somewhat decent RPM's at highway speeds. Combined with a Steeda stage three suspension kit, the vehicle has no wheel hop so I know I'm putting every lb of torque straight into the ground. Punching it even at around 25-30 MPH spins the tires and sends the vehicle in a horizontal direction (can't say that for the stock 3.55's.) I have an automatic and during hard acceleration from the stoplight I can now choose whether to floor it and go sideways or feather the pedal for a quick smooth takeoff. Either way, the vehicle is much more fun to drive but I'm sure a new set of tires will be in order soon! I'm the kind of driver who is addicted to fishtailing around every corner, so these gears were exactly what the Dr. ordered. I had a local speed shop install them and there was a bit of gear whine at first, but after about 100 miles, they quieted down. Had the shop changed out the diff oil after about 200 miles to clear out any metal particles from the break-in period. Overall - If smokey burnouts, donuts, and attracting attention from bystanders (I.E. law enforcement) are not your thing, definitely go with 3.73's, otherwise order up and have some axle twisting fun!

    korstellan

    Year: 2007 Submodel: GT San Antonio, TX, USA

    Helpful (7) (0)

  • 5/5

    Installation Time: Afternoon

    December 01, 2013

    really helped top end out

    i have a auto but im really happy with the gears down low help with my long 2nd and it dont fall on its face in 3rd as of wheel spin no more then stock 3.27 i drive about 70% hwy n 30% city n iv only dropped 1 mpg well worth it tho @ 60 im about 2350 rpmwith the 4.10 from my 1850 rpm @ 60 with 3.27

    fast04stang

    Year: 2004 Submodel: GT wi

    Helpful (4) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    October 14, 2014

    Wakes up your S197!

    I have a for the most part stock 2008 GT. It came with the factory 3.55 gears.All my other mustangs had 3.73s. I was skeptical about the 4.10s. But going from 3.55 to 3.73 is a waste of time and money. Checked out YouTube videos, the AM comments here and hit up Mustang forums and majority said the 4.10s with the 5 speed are perfect. So I went with this kit. Awesome investment, the kit has everything you need for the upgrade. Just remember you will need a tuner! After completion, I took it out and it was a whole new car. Acceleration was much better, and no need to downshift to pass someone. These gears keep the car in that powerband range and is responsive from whatever gear you were in. Highway driving not bad as I did see from the videos and now in person, 70mph, rpms @ 2400-2500 range, not bad. No regrets whatsoever! Excellent kit and price. Thank AM!

    VTL1180D

    Year: 2008 Submodel: GT New York, NY, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    December 22, 2013

    bring it on !!!!

    The ford racing 4.10 gear is my best move so far ..... excellent return for the money invested .... my car feel like i just put 50horses on it .... $$$ bit more on the highway ..but .... camaro assasin lol .... if you're hesiting between the3.73 and 4.10 go the the 10 you'll never regret it ... thanks american muscle for the complete guide for choosing a gear for my application ....

    martinthetrain

    Year: 1997 Submodel: GT Québec. Canada

    Helpful (2) (0)

  • 5/5

    Installation Time: Full Day

    October 10, 2014

    Holy Smokes!

    First off, I did take it to a shop and had it done professionally. It cost $525. So total out of pocket is under $800. I have done CAI, tuner, short throw shifter, lowering springs, and wheels. THIS IS THE FIRST THING THAT SHOULD BE DONE ON ANY MUSTANG. Unbelievable difference in the launch, running through the gears, the whole deal. I can't wait for one of those little import tuners to flex some muscle. I definitely can hold my own against them, but they always get me off the line. I don't think that will be a problem any more. I don't know why this is not a standard gearing for the Ford Mustang.

    dherring

    Year: 2008 Submodel: GT Colorado

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    June 24, 2014

    Works in my 1992 F150 5.0 V8 wiht 8.8 Rear end

    This fit my truck 1992 F150 just right and the Rpms went up by 300 at 65 mph, so if for what I paid worth it for sure.

    Simek07

    Year: 1992 Submodel: Other Council Bluffs, IA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    February 21, 2014

    Installed Instant Power

    Shop installed the gears for me, I instantly noticed the difference in acceleration. Be sure to get the gear that fixes the speedometer otherwise your speedometer will be off. Great bolt on gear for you mustang. If you are looking for instant acceleration 4.10 gears are the way to go!!!

    jking32

    Year: 1998 Submodel: GT Rapid City, SD, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    January 19, 2014

    0-60 in *WOW*

    I have an automatic. 4.10's are exactly what my Stang needed. I was so bored driving around at 1600 rpms. Now I cruise around at 2200-2700 rpms and wirh my PYPES catted X-pipe ot sounds like a GT should. My motor seems to have a lot less stress on it to when I'm accelerating. I didn't notice any less mpg too. My gas mileage totally depends on the way I drive. Thanks A.M.

    Mosified

    Year: 1996 Submodel: GT Philadelphia, PA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 14, 2014

    The best stuff out there

    If you're swapping gears this is the way to go. Ford Racing has the best quality product at a reasonable price. Everything you need in one package - no need to search for every little detail separately. Easy to assemble, easy to set. Paired with quality lubricant for best protection under load. Quality is important.

    Yankee27

    Year: 2008 Submodel: GT Chicago. IL

    Helpful (1) (0)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    January 10, 2014

    4.10 Install

    The product was of good quality as are all A.M products. I did however call several times inquiring if the kit comes with axle bearings and seals, and was told twice (by two different A.M professionals that the kit does come with the bearings and seals). I was informed by my mustang specialist mechanic when i came to pick up my car that the kit DID NOT come with the bearings or the seals. I was lucky enough that my original 09' bearings have only 23,000 miles on them and were still in perfect condition. So, if your mustang has quite a few miles on it, I would recommend also buying new seals and bearings. Other than that, the gears along with the Hurst shifter I installed, the car feels great. Thanks American Muscle.

    johnsGT

    Year: 2009 Submodel: GT South Carolina, USA

    Helpful (1) (0)

    • Response from AmericanMuscle

      My apologies if those you spoke with possibly misunderstood your question. As you mentioned, this kit does not come with Rear Axle Bearings and Seals; though we do sell those separately if needed. Glad to hear you are enjoying your newly installed gears! New gears can definitely make your Mustang feel like a totally new beast.

      Lisa , Customer Care

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