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

Market Price $319.99 You Save 19% ($60.00)
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$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?
    • Bullitt - 01, 08, 09
    • Cobra - 93, 94, 95, 96, 97, 98
    • Cobra R - 93, 95
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09
    • GT500 - 07, 08, 09
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 86

    People Who Bought This Item Also Bought

    Most Helpful Reviews

    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 ...

    Read More
    Helpful (17)

    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 ...

    Read More
    Helpful (10)

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

    Customer Photos (14) Submit Your Photo

    View All 14 Photos

    You Might Also Like

    28 Questions / 8 Answers

    Ask a Question

    Should I get the Traction-LOK rebuild?? I have a 2007 mustang GT automatic with only 20k miles on it.. Do you think I need the traction-LOK rebuild kit.. PLEASE HELP I don't know what to do !!!!


    • Yes go ahead and get it. It will upgrade it the cobra and gt500 specs. The carbon discs hold up way more. And since I'm sure you'll be getting nasty with those 4.10s I'd go ahead and upgrade. You'll have to reuse your clip spring though the kit comes with a cobra spring. But yes go ahead and spend a little extra!


    Show 2 more answers Helpful (6)

    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.


    • 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!


    Show 1 more answer Helpful (2)

    Real quick question, ordering these gears for my 97 cobra. Which gear tooth exactly will I need to fix my speedometer?? 97 cobra stock t45


    • For your 97 Cobra with 4.10's you would either need a 23t speedo gear, or you would need a 6 tooth drive gear used in conjunction with a 20t speedo gear. We do not offer and recommend against the 23t speedo gear, as they have a tendency to wear prematurely not seen in the lower tooth count gears.

      Rob D

    Helpful (1)

    Hi. Was looking this kit up online about a month ago and it was stated you were out of stock. Then received an e-mail last week saying they were now in stock. But, presently the ad states it's out of stock. Which is it ? Also, what brand of gears and bearings come with this assembly ? Thanks. HT


    So I see it says 86-09 V8 but I see similar kits online that are compatible with v6 and v8. So is this just for V8s or can it be installed on a v6.


    • This Ford Performance 4.10 Gears and Install Kit is only intended to be installed on the rear end of 86'-09' V8 Mustangs.


    Helpful (0)

    Do i really need the rebuilding loc kit? I have a 2001 ford Mustang gt convertible 5 speed with 97k miles I want to purchase the 4.10 install kit


    • The Ford Performance LOK kit is not required to do when swapping how gears, however, it would not be a bad idea to have everything changed to new when you are in and doing the 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 4.78 4.8
    • Fit 4.9 4.9

    • 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!


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

      Helpful (17)

    • 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


      Year: 2004 Submodel: GT wi

      Helpful (10)

    • 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!


      Submodel: GT Pengilly, MN

      Helpful (5)

    • 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...


      Year: 1999 Submodel: Other

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      January 24, 2017

      Complete Kit

      The stock 3.27 gears that came with the car required a lot of down shifting, especially when in over drive. That is no longer an issue since installing the 4.10 gears, I actually have passing power in over drive! In fact the car pulls hard in every gear, it is just the perfect gear for the car. On the highway it is louder, but if I take my foot off the throttle and use cruise control it is fine. The car has cai, 70mm tb, loud mouth cat back exhaust, a race tune, short shift and a big smile on my face.


      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      November 16, 2015

      Don't fear the gear

      These gears are amazing. Really wakes an automatic up. I took my car to the 1/8th mile track and ran a 8.4 spinning. Only mods I have is an o/r xpipe and CIA plus a tune. Worth every bit of the money I spent. Gas mileage has not suffered and neither has top speed. If you are thinking about getting these gears do not hesitate you won't be disappointed!


      Year: 2007 Submodel: GT SC

      Helpful (3)

    • 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.


      Year: 2008 Submodel: GT Colorado

      Helpful (3)

    • 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 ....


      Year: 1997 Submodel: GT Québec. Canada

      Helpful (3)

    • 5/5

      January 10, 2017

      Great gear!

      These 4.10 gears really woke up my low end and gave my car the punch I was looking for. They really do make a difference I can feel. On a side note make sure you get a tuner that will calibrate the speedometer. I have the Bama SCT and the team only took one day to get back to me with my tune. I don't know my baseline but it feels a lot stronger pulling through the gears!


      Year: 2008 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      October 25, 2016

      Great results

      I use my 99 GT vert as a daily, and the guy I had installing these definitely attempted to persuade me not to get the 4.10s. I did anyway :) Since its an automatic, the performance gain was probably not as noticeable as if I had a manual. For instance, a friend who has only rode in the car a couple times will probably not be able to discern a difference. I did. The minute I floored it on the back road near the mechanic I knew I made the right choice. SO much more pull, and now my auto hits red in RPMs when I want it to, which I appreciate. My consensus: you will be disappointed with any lower ratio than this.


      Year: 1999 Submodel: GT

      Helpful (2)

    • 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.


      Year: 1995 Submodel: GT

      Helpful (2)

    • 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!


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

      Helpful (2)

    • 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.


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

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 02, 2014


      Great product you can fill the car wants to take off. I get quicker to the rpm's quicker get up and go


      Year: 1998 Submodel: GT

      Helpful (2)

    • 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.


      Year: 1996 Submodel: GT Philadelphia, PA, USA

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 10, 2017

      Don't fear the gear!

      I was a bit nervous about putting .410 gears in my mustang. After installation, all fears were gone. I only gained about 500 rpms at 70 mph. The pull that it has now is very pleasing. Wish I had had these installed earlier.


      Year: 2000 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      November 23, 2016

      Should be stock

      4.10 are are a must for a daily driver bolt on Mach. Made the car feel like it should, nice SOP feeling. Probably could have gone 4.30 and still be ok. Around 2k rpm at 70mph on the highway with the Mach 1 tr3650. 4.10 really make the car easier to drive in stop and go situations.


      Year: 2003 Submodel: Mach 1

      Helpful (1)

    • 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.


      Year: 2003 Submodel: Mach 1

      Helpful (1)

    • 5/5

      September 08, 2016

      Instant tire shredder.

      The 4.10 gear turned the car into a tire shredder! You will not be disappointed. The install kit included everything, the only thing the drive line shop could charge me extra for was 2 cans of Brake Clean! Mod requires you have a tuner as even Ford can not change the computer to 4.10 gear ratio.


      Year: 2005 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      May 13, 2016


      I purchased this kit and had it professionally installed along with posi-traction. The torque improvement, response post install is awesome. A perfect compliment to all my other mods like 1 piece aluminum driveshaft, shocks/struts/springs, front/rear sway bars, rear upper/lower control arms. Absolutely recommend this upgrade.


      Year: 2005 Submodel: GT

      Helpful (1)

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