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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

    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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    31 Questions / 40 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 !!!!

    Mustangdude

    • 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!

      hubaduba12

    Show 2 more answers Helpful (6)

    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

    Venom

    • 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 (3)

    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

    Show 1 more answer Helpful (2)

    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

    JamesB

    • 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.

      Ricky36

    Helpful (1)

    can i use this oil ? car specifies 75-140

    bigman07

    • Use the oil that comes in the kit.

      88GTConvertible

    Show 1 more answer Helpful (1)

    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?

    Indypacer1

    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 4.786408 4.8
    • Fit 4.902913 4.9



    • 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 (8)

    • 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 (1)

    • 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 (1)

    • 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 (3)

    • 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 (2)

    • 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 (4)

    • 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 (2)

    • 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 (2)

    • 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 (2)

    • 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 (2)

    • 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 (3)

    • 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 (2)

    • 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 (3)

    • 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 (4)

    • 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 (3)

    • 5/5

      August 13, 2017

      **** Serious Fun ****

      I really labored over 3.73 or 4.10 and everything I was reading seemed like quite a few people that picked the 3.73 wished they had gone with the 4.10. Granted, you lose top end but I'm rarely in that neighborhood and the low end is way too much fun. The other thing I was worried about was noise in the cabin on the freeway at speed, pppfffttt... no worries, even with the windows down. That being said I still have stock exhaust ;), soon to change. I found a shop for the install and they struggled with it but after bringing it back to get it right they did a great job. All in all, 0 regret

      RickJ

      Year: 2006 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      July 05, 2017

      4.10 gears

      huge difference with the gears a must have its a long install but worth the time

      John

      Year: 2003 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Full Day

      July 04, 2017

      stang it!

      perfect fit! LMR has nailed the install of this item. The only thing i would change is the install kit, dont need the nut crush collar or all those shims but you do need wheel bearings and seals to do the job right and i feel that these items should have been part of the kit?

      Bill

      Year: 2007 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      July 02, 2017

      Woke up the rear

      Way better than stock. looking at 2.5k ish when doing 70-75mph in 5th but the overall driving experience has just gone way up.

      TravisE

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 30, 2017

      what can I say !! 4:10's

      This kit came with everything to get my 4:10 gear and torsen diff. installed.

      Daniel

      Year: 2005 Submodel: GT

      Helpful (3)

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