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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, Video & 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

    Review & Installation Video

    Review & Install Video

    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

    CA Residents: Warning: California's Proposition 65

    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, 99, 00, 01, 03, 04
    • 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

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    Questions & Answers (34)

    5 Top Rated Questions

    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!

    Helpful (6) Show 2 more answers

    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.

    Helpful (3)

    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 (2)

    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!

    Helpful (2) Show 1 more answer

    can i use this oil ? car specifies 75-140

    • Use the oil that comes in the kit.

    Helpful (1) Show 1 more answer
    Post Your Question
    10 More Questions
    is anything else needed to change gears 1 answer
    I've had 2 quotes for this upgrade by local shops. 1 was for $2100.00 plus tax telling me I need to upgrade my carrier as well. the other was for $1200.00 plus tax both are way higher than the suggested cost. I own a 2007 Mustang GT 4.6L 3v that has a 3.31 rear with 8.8 axles why would the cost be so much higher than what you list on your site. 2nd question Dose this car ave a 28 or 31 spline? 1 answer
    Would this fit my 2014 mustang gt 1 answer
    I was told I need to replace my rear end, would this kit be all I need to rebuild it instead of buying a new rear end? 1 answer
    Hi, I have a 1996 Bronco and was wondering if one of these kits would fit the 8.8 in the truck? Was planning on installing a Detroit Trutrack locker and 4.10 gears. Thanks! 1 answer
    so I am thinking about putting 4.10s in my 06 GT automatic. The only thing is that I travel a lot so how would these affect my performance on the highway? How much gas mileage will I be sacrificing? 1 answer
    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 1 answer
    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. 1 answer
    Will it work with a automatic what do u need to do and will the 4.10 gears work with a stock 2008 mustang gt 1 answer
    Will is work with a stock mustang gt and then put the 4.10 gear 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.777778 4.8
    • Fit 4.907407 4.9



    • 5/5

      Installation Time: Full Day

      October 31, 2018

      Don't fear the Gear!!

      This should be one of the fisrt mods done on any car. My Pony has being awaked!. Totally different car. In conjuntion with a 3000 stall converter snaps on every shift.. And without OD, its another experience. Love driving my car.

      DennisD

      Year: 2006 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      October 30, 2018

      Whole new car!

      4.10 gears made my 00 Mustang GT feel like a completely different car. 10/10 mod everyone needs.

      BrandonH

      Year: 2000 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Full Day

      October 28, 2018

      Great product

      Must include this in your new gear install excellent priced as a kit with the gears I bought and why not replace all you bearing when it already apart easy dessision to make. High quality parts at a great price

      JonD

      Year: 2002 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      October 25, 2018

      great for around town driver

      if your looking for more butt dyno power these will do the job. be warned that highway rpms are really high and if you daily 70mph plus wih a manual trans you may be unhappy with how high it has to be in the rpm range.

      ChristopherW

      Year: 2009 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      August 24, 2018

      4.10

      Do not fear the gear!! Were I live highway speed limits are 55 to 70mph.... But when you punch the pedal it's a game changer... It made my stock 97gt with the pi swap and cams and some mild bolt on and it will wake it up... I recently put a serious quick whooping 0n a 2010 rt challenger from a dig.. They make 450hp stock.. So thats night and day for you... You will be in love... Now I'm going boosted so I might be going 6speed but till then I'm in love with the 4.10

      BobbyB

      Year: 1997 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      June 15, 2018

      So Beyond happy I went 4:10

      Most amazing decision ever to make instead of 3:73 gears and I’m heavily modified and it’s so worth the money and was such an easy painless install by my mechanic thanks american muscle.

      Anthony

      Year: 2008 Submodel: GT

      Helpful (9)

    • 5/5

      Installation Time: Afternoon

      April 14, 2018

      4.10 the best

      Installation was a breeze. Took my mechanic half day to finish but he did a great job. No vibrations at all and works great. Drives like a whole new car and good power

      MustangDubai

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      April 07, 2018

      Torque 2005 GT

      Wow like a different car! Much more power in all gears, fifth is actually a usable gear now. And the car still has good top speed. Had my garage install these along with new axel seals. My mechanic said the kit was complete and fitment perfect.

      JT

      Year: 2005 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      January 12, 2018

      What a change in my manual!!

      Had the car for 5 years and started looking into gears about a year ago or so. Can't believe how much different it feels. 1st gear is still usuable, I just shift higher than I use to and I can run through 3rd and into 4th without hitting speeds I don't want to. I have rarely ever taken the revs above 5k and rarely above 4k in the past, now I hit above 4k daily and love it. No gear whine so far so shop did a great job. Gas mileage looks to have dropped about 2mpg but I shift higher than before and have been getting on it more so it may have only been 1mpg if I drove the exact same...which I won't do now.

      Shredder

      Year: 2003 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      November 17, 2017

      07 Gt500

      Nice kit came with everything had a shop install it for me $230.00. The 4:10 are a little much for a gt500 with stock tire size. Switched to 29inch tall tires and car is a beast!

      MatthewH

      Year: 2007 Submodel: GT500

      Helpful (4)

    • 5/5

      November 13, 2017

      4.10 gears and loving it

      Had a friend install them with no issues love the new feel really wakes the car up

      RobertH

      Year: 2004 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Full Day

      November 08, 2017

      410 gears

      Best thing I've done to my car!! I waited a month to see if the 373 kit would be back in stock and got impatient so I got the 410s. Man am I glad I did. My car is 10× more fun to drive. I cannot wait to drive my car everyday. I drive on the highway for 3 hours a day and its not bad. I'm around 2400 at 70 and it sounds good. Do not hesitate to get the 410s!!! You will love it and will not regret it. Thanks AM!!!

      KeithR

      Year: 2003 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      November 05, 2017

      No regrets

      First gear is a waste, but the the Oomph you get in 2nd, 3rd and 4th is well worth it. By far the best upgrade I've done to my car (I'm also running the Bama Racing tune).

      ArmandoH

      Year: 2009 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Weekend

      October 31, 2017

      Best Bang for the Buck ... Period!

      I used this kit to swap my 3.27's to 4.10's and did the work myself. The only part I needed a shop for for pressing on and off the pinion and carrier bearings (I'm not a tech by any standards). I had heard that if you use the factory shims (in the same orientation) that pinion depth, backlash and pattern would probably be good; and they were perfect! All-told it took me a bit longer than listed because I pulled the whole axle, did the axle bearings, painted everything; etc. In my opinion; the best mod for the money! This turned my trotting Vortech 2V pony into a bucking ... well ... Mustang. Thanks again AM, wow ... just wow!

      DanielD

      Year: 2003 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Weekend

      October 23, 2017

      4:10 gears

      The best mod you can do for your 4.6 awesome response like night and day difference.well worth the money

      EdwardM

      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      October 20, 2017

      4.10 gears awesome

      I'm ripping through gears now better throttle response and take off

      JoshuaL

      Year: 1996 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Full Day

      September 30, 2017

      Zero to fun like a 'stang should.

      Used these to replace a set of 3.55 in an '93 LX getting set up for auto-cross. Had everything needed. Use RTV instead of the gasket. Bears are great, lube is top notch.

      Pheagey

      Year: 1993 Submodel: LX

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      September 03, 2017

      Really wakes up the 4.6

      This is a must I love the change in performance with the mustang. It is a little different driving city but when you really let the car open up it is a noticeable difference. A must have for the 4.6

      wcc7890

      Year: 2007 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      August 25, 2017

      Perfect performance and semi daily gears

      For the longest time I was debating between 4.10s and 3.73s. I wanted to extra kick 4.10s would give but was worried it would effect drivability of the car around town - I'm not really a daily and not really a weekend warrior - somewhere in between. I was thoroughly impressed by these gears. You're pretty much always in the power band and the car is far more fun to drive than before. It goes without saying you will sit at some higher RPMs at highway speeds, but it hasn't totally killed my mileage as I've slipped from roughly 17 MPG to 15.7 MPG. A difference, sure, but not as bad as it could be. If you're on the fence about what gears to get, trust me and go 4.10 - you've won't be sorry.

      YJeter2

      Year: 2006 Submodel: GT

      Helpful (6)

    • 5/5

      August 16, 2017

      Best bang for buck

      By far the best bang for your buck, had a buddy put them in for me for around 200$. Made my 97 cobra a lot more fun to drive and not such a dog with the stock 3:27's. Honestly makes daily driving better (for me atleast) getting in the power band quicker. Thanks AM!

      Gearman19

      Year: 1997 Submodel: Cobra

      Helpful (5)

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