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Ford Performance 3.55 Gears and Install Kit (10-14 V8; 11-14 V6)

Market Price $316.99 You Save 12% ($37.00)
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$279.99 (kit)

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  • Item 100572
  • MPN# 100572

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    Features & Details

    • Money Saving Combo Kit
    • Ford Racing 3.55 Gears - 8.8"
    • Ford 8.8" Rear Gear Pinion Bearing
    • Motive 8.8" Rear End Installation and Bearing Kit
    • 1 Bottle of Ford Racing Friction Modifier
    • 2 Quarts of Royal Purple Max Gear 75w140 Gear Oil
    • Fits 2005-2014 V8 and 2011-2014 V6 Mustangs 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, inner rear gear pinion bearing, 1 bottle of Friction Modifier, 2 bottles of 75w140 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 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 3.55 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 2005-2014 GT, Bullitt, BOSS, Shelby GT500 and 2011-2014 V6 models.

    Application Note: Does not fit 2013 Boss or 2013-2014 Shelby GT500 Mustangs with axle codes S-215-D and S-219-D.

    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: 2010 2011 2012 2013 2014 Details

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    • (1) Rear Gear Pinion Bearing
    • (1) 3.8 fluid oz bottle of Friction Modifier
    • (2) one quart bottle of Royal Purple Max Gear 75w140 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?
    • Boss 302 - 12, 13
    • GT - 10, 11, 12, 13, 14
    • GT500 - 10, 11, 12, 13, 14
    • V6 - 11, 12, 13, 14

    Does not fit 2013 Boss or 2013-2014 Shelby GT500 Mustangs with axle codes S-215-D and S-219-D.

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    8 Questions / 6 Answers

    Ask a Question

    Don't you have 3.31 option for these kits?

    SamJ

    • At this time, we only offer the 3.55, 3.73 and 4.10 gears in the full kits for the 10-14 GT and 11-14 V6 models.

      AMJustinH

    Helpful (0)

    I own a 14 V6. I was thinking of going with ford performance 3.55 or 3.73 gears. Do I need to buy the Trac lock disc kit? What are benefits of buying that kit as opposed not getting it? My car is a daily driver and mostly hwy. Don't want to lose significant MPG. Thanks

    ChanoMann

    • The Ford Performance 3.55 Gears and Install Kit will include everything needed to install new gears in your rear end. The Trac Lok disc kit would be used to rebuild your existing Trac Lok differential, and will have no effect on MPG. This is used to rebuild a unit that is beginning to slip, and is not needed for applications where the Trac Lok LSD is in good working order.

      Rob D

    Helpful (0)

    Hello Will this gearing be too much for s supercharged car(14 GT)? Recommmend higher or lower gearing? Currently running 3.15s Thanks in advance

    MichaelS

    • Depending on your exact application and what you are looking for out of your GT the 3.55's in this Ford Performance Gear and Install Kit may be just what you are looking for, however, it would really come down to those two factors.

      AMJEFF

    Helpful (0)

    hy, i have a 2012 v6 convertible automatic, if i want to upgrade my gears, which is the best for me, 3.55, 3.73 or 4.10, daily driver! mine comes with stock 2.73 gears?

    JorgeR

    • 3.73 gears are the best option for daily driving and more torque. Because you have an automatic you can also use 4.10s because of the overdrive in the automatic mustangs.

      AM MikeW

    Helpful (0)

    i asked a question about the royal purple the rear end takes 3 quarts of oil and kit only includes 2 moderator stated with friction modifier it is 3 quarts, however 3.8 fl oz is not the equivelent to one quart so im assuming im going to be short gear oil?

    JacobA

    • The service fill on the Ford 8.8 Differential equipped in your Mustang will be 1.99 to 2.12 Quarts to achieve the correct fill level (5mm below the fill plug). With the 2 quarts of gear oil, and the friction modifier you should be able to complete the axle fill with no issues.

      Rob D

    Helpful (0)

    im confused how many quarts of the royal purple do you need, because some people have said i need 3 qts and this only includes 2 it is a 2014 mustang v6

    JacobA

    • To fill the 8.8 rear end generally you need 3 quarts in order to top it off. The Ford Performance 3.55 Gears and Install Kit comes with 2 quarts and friction modifier which gives you the full 3 you need for the 8.8 rear end.

      AM MikeW

    Helpful (0)

    People Who Bought This Item Also Bought

    Customer Reviews (26) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.68 4.7
    • Fit 4.68 4.7



    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      April 11, 2018

      Great

      Had a offroad and performance shop install them, no noise. Feels great and makes the car more fun to drive.

      KeyvanN

      Year: 2012 Submodel: V6

      Helpful (2)

    • 2/5

      March 19, 2018

      Good gear ratio

      It's a good gear ratio but my gear broke so it's up to you if you want to buy this one

      TonyBoss

      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      February 27, 2018

      Pulls Like a Champ Now!

      I love this set of gears. Big difference from the stock 2.73s. I chirp the tires quite often because I forget about the new freed up power. Gas mileage not really affected. Shop install because I wanted done right!

      DeadpoolStang

      Year: 2014 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      February 15, 2018

      Big difference !

      Put in a cai, performance exhaust, shorty headers and now 3.55 gearing from the 2.73. Really pulls hard now in low to mid rpms.

      DonC

      Year: 2014 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      February 02, 2018

      great value

      This kit is common on other sites for a similar price But without the Fluids. So basically Free Royal Purple and ford friction additive is a deal to good to pass on. This is a great upgrade and very affordable so its a win-win.

      MadisonR

      Year: 2012 Submodel: V6

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      November 24, 2017

      3.55 for the 5.0

      Car came stock 3.15 cause it’s the Auto so putting in the 3.55 should be a good upgrade for when I drop the boss intake under the hood super excited to do this build

      AzeeJ

      Year: 2013 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      July 01, 2017

      Best alternative

      Before I have install this Kit, I have a 3:73 kit and the sounds from the rear axle was to much. Now it will be silence and in combination with the carbon driveshaft it was perfect.

      RKestel

      Year: 2011 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 27, 2017

      Big improvement

      Years of 2.73 gears, wow what a difference. I will say that they do make a little noise over the stock gears. Car seems much quicker now, RPMs come up much faster. Before I would step on the gas and wait for something to happen.

      Stevew

      Year: 2011 Submodel: V6

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      June 08, 2017

      3.55 gear and install kit

      Awesome. Everything you need to install gears and makes it easy and affordable.

      BryanS

      Year: 2014 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 02, 2017

      Best performance gain for the $$

      Went from 2.73 to 3.55 in my 2012 V6. Amazing difference in acceleration and drive-ability. I also installed the cobra limited slip diff at the same time, which I highly recommend since the carrier will be out anyway. You will need the extra traction too with the gear change. It took 2.5 quarts of fluid, so get an extra quart. Install kit was good quality as well. I highly recommend a shop install as this is precision work to do it properly.

      MaxS

      Year: 2012 Submodel: V6

      Helpful (6)

    • 4/5

      July 12, 2016

      Great Gears

      I bought these gears instead of the 3.73's because i drive the highway 2 hours everyday and this was a great decision! once i got it tuned the gears banged like no other, felt like a completely different car with a lot more torque. Great value, came with everything i needed, install wasn't to hard but thats also because my buddy and i are mechanics. definitely worth the money!

      Stang

      Year: 2012 Submodel: V6

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 14, 2016

      More responsive.

      Changed from 3.31 to 3.55 ratio. Car is "Quicker" in each gear so I am shifting faster as a result. Roll on throttle in 3rd - 5th gear is substantually better than it was. 6th gear is still a good highway gear (2200 rpm @ 80 mph.). I still haven't traveled any distance to get an idea of GPM difference. I am happy with the change. Almost seems like driving a different car.

      Chris

      Year: 2013 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      October 16, 2015

      Don't look back.

      If you are not satisfied with your stock 2.73's or feel like you want to bump up the power, GET THESE or 3.73's. I have not tuned my car yet but I noticed a huge torque gain in every gear. Throws my head back in every gear except 6. Find a reputable shop to Install these. Don't waste money on other bolt on parts before you do this!!

      Jiggletbigcligs

      Year: 2014 Submodel: V6

      Helpful (4)

    • 4/5

      Installation Time: Full Day

      September 26, 2015

      gear kit

      a big improvement.using much more of the available torque.The stock gears were for fuel economy and not performance.if you have the 2.73 this is a must.Had to learn how to drive it all over again but well worth it.

      Sylvia2011

      Year: 2011 Submodel: V6 bedford.michigan

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      September 24, 2015

      3.55 Gears

      Just had my gears installed today. Local Ford dealer did an outstanding job. I have read here about install missteps. Install was done right. Took all day but the wait was worth it. Feels like a new car. Definitely worth the effort and money. Great service from American Muscle also.

      RickD2XNE

      Year: 2014 Submodel: V6 Lincoln, Nebraska

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      June 15, 2015

      Better performance

      My v6 automatic had stock 2:73 gears. Great for 32 mpg but nothing else. I needed more power to the road a lower speeds when driving thu the twisties. Had them professionally installed for $350.00 . I can do most thing on a car but wouldn't think of putting gears in myself. Well worth the 350 install price.

      Frank

      Year: 2013 Submodel: V6 easley, SC

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 14, 2015

      New gears, way better than stock!

      I had a local shop put the gears in while I was at work. It took them about half a day and the install was $408. He recommended a break in period of 300 miles. Then when they were ready I hit the gas and noticed a big improvement over stock. I had to wait a few days for a new tune to fix my speedometer but I just used my gps to get by. My car now runs about 2100 rpms at 70 so I don't think my gas mileage will change much. Now that I have the shorty headers, throttle body, CAI, Bama tune, and gears it's a LOT more fun to drive!

      Optimized

      Year: 2012 Submodel: V6 Mount Pleasant, WI

      Helpful (4)

    • 3/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      May 14, 2015

      3.55 ring and pinion kit

      ring and pinion were fine and accomplished what I wanted but the bearing and seal kit was not the right one for my year mustang. Better check the kit before giving it to your installer. Also there is not enough rear end oil in the kit to fill it. It was about 3 pints short.

      Max

      Year: 2011 Submodel: GT Illinois

      Helpful (4)

    • 3/5

      Installation Time: Full Day

      November 02, 2014

      3.55 gears

      Decent quality kit, but I believe Ford Racing offers much better quality, so I would recommend buying all Ford Racing parts and forget the kit. My biggest disappointment is with the shim assortment. You will receive numerous shims of the same size so there is no way to precisely adjust your contact pattern without buying additional shims.

      My2014Stang

      Year: 2014 Submodel: V6

      Helpful (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      October 27, 2014

      gear noise

      my mechanic warned me against this brand (he recommended Richmond or Motive) due to noise, but since I didn't see very many complaints about this, I went ahead with the purchase. I'm hoping that as these break-in, the whirring will diminish -- it seems to be most noticeable in the 1200 to 1800 RPM range. I also have a MagnaFlow exhaust, so the noise might still be there at higher revs, but the exhaust note drowns out everything else. my '11 GT had 3.15's, and these were a noticeable improvement, without too much higher RPM's during cruising.

      JG183

      Year: 2011 Submodel: GT Edgewater, NJ, USA

      Helpful (4)

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