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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)
Our Price

$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?
  • GT - 10, 11, 12, 13, 14
  • GT500 - 10, 11, 12, 13, 14
  • V6 - 11, 12, 13, 14
  • Boss 302 - 12, 13

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

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
THE Best bang for your buck mod you can do.

I had my these gears installed by a local shop, and after cruising around on them for a week or so now, I can't think of a better way to have spent my money. When combined with a new Bama tune, I was shocked ...

Read More
Helpful (4)

5/5
3.55's on a 2014 V6

Take into consideration that I did this mod along with a Steeda CAI and a SCT 91 tune. Talk about a different vehicle, wow. If you're considering any mod, definitely go with this combo. It really makes ...

Read More
Helpful (3)

Overall Rating 4.6 out of 5 stars
Read All 20 Reviews

Customer Photos

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7 Questions / 5 Answers

Ask a Question

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)

The Ford Performance 3.55 Gears and Install Kit (10-14 V8; 11-14 V6) will not come with the new pinion bearing that is needed for the 2010 mustangs. You would need to buy this separate. i have a 2013 mustang gt. so will i still need a pinion bearing for my car, cause on list it says it comes with a pinion bearing?

chuck

  • The Ford Performance 3.55 Gears and Install Kit will require the use of the updated pinion bearing when used with any 2010 and newer Mustang. The Updated pinion bearing, item number 52994 IS included with this kit, and is not required as a separate purchase.

    Rob D

Helpful (0)

sowhat is it about the pinion bearing in the 2010 and above mustangs ? I have a 2o12 v6 auto and im considering these for my next mod.

BlackAcidLion

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Customer Reviews (20) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.68421 4.7
  • Fit 4.736842 4.7



  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    December 17, 2013

    THE Best bang for your buck mod you can do.

    I had my these gears installed by a local shop, and after cruising around on them for a week or so now, I can't think of a better way to have spent my money. When combined with a new Bama tune, I was shocked with just how much quicker the car pulls over the stock 2.73 gears that I swapped out. Acceleration is smooth and strong all the way to the now much-quicker-approached redline. Whereas the car barely wanted to squeak the tires on take-off before (slushbox), I now have no problems whatsoever in wasting rubber on launches and on the 1-2 shift! Now, for the other main concerns most people have with new gears: noise and fuel consumption increases due to higher revs. With 3.55 gears and stock 18" tires, I'm now running at about 2200rpm in 6th gear at 70mph, as opposed to 1750ish RPM at 70 on the 2.73's (again, with the slushbox). With my Dynomax catback, I definitely do hear more "noise" at highway speed, but honestly, that's what I wanted when I had the exhaust put on. I don't hear any sort of annoying "drone" unless the engine is under load at highway speeds, such as crawling up an incline. For basic cruising around, it sounds just fine. As for the impact to fuel economy, the jury is still out on that one as I have yet to run through a full tank. My trip meter is telling me I'm averaging right at 20mpg currently as opposed to hovering around 22ish like normal, but it's never been entirely accurate. Of course your mileage may vary, as the bulk of my driving is off highways, commuting to and from work on roads that vary from 40-55mph with traffic. That, and I've been out having fun with my new-found acceleration instead of driving like a normal person! In conclusion to this long-winded review, if you've grown tired of the ridiculously tall factory gearing breaking any and all speed limits before leaving 2nd gear, this is a no-brainer mod. It's not an easy mod (my shop ended up trying 4 times before getting everything perfect), but it's one of the best things you can do to your Mustang.

    t0ad

    Year: 2013 Submodel: V6 WV

    Helpful (4)

  • 5/5

    Installation Time: Full Day

    October 03, 2014

    3.55's on a 2014 V6

    Take into consideration that I did this mod along with a Steeda CAI and a SCT 91 tune. Talk about a different vehicle, wow. If you're considering any mod, definitely go with this combo. It really makes it feel like you have a different vehicle. Very quick, better shift points and a whole lotto fun. I was contemplating 3.55's or 3.73's, obviously went with the 3.55's and couldn't be happier. Do a fair amount of highway driving and my automatic runs around 2100 rpm's at 65 just for a reference for anybody considering this mod. Also bought the install kit, which honestly I wouldn't pursue. The gear oil included was the wrong weight, and since the car was new, really didn't need all the extra bearings/seals included in the kit. Had it installed at a garage for about $400/ actually a little less than that since the mechanic bought back the kit oil from me. All in all, if you can afford a couple mods, wait for exhaust and go with gears/ CAI and a tune - you'll thank me for it, and you'll think you have a new mustang!

    RichK

    Year: 2014 Submodel: V6 Alamogordo, NM

    Helpful (3)

  • 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 (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    March 21, 2014

    Instant sports car... fixed the weakest point in a 2014 V6 Mustang!

    No whine at all, just like the Ford factory 2.73 gears quality, of course, it's by Ford! Local Knoxville Performance Shop did a fine job, took 3 hours. Coupled with a Bama tune and Borla mufflers, my V6-Automatic is about half way there. Next up: lowering springs, X-pipes, CAI and Throttle body will complete the internal modifications... 1970 Boss 302 vintage power in an economical 229 cu. in. V6!

    Henry99

    Year: 2014 Submodel: V6 Knoxville, TN

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    January 25, 2014

    Best Bang for buck

    Install went smooth no whine at all. Night and Day difference going from 2.73s to 3.55s. Highly recommend.

    Ksweezy

    Year: 2012 Submodel: V6

    Helpful (2)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    July 27, 2014

    Poor man's turbo

    Definitely could feel the increase in torque after installing the 3.55 gears, only a slight decrease in mileage at highway speeds, around town I get better mileage now. Be careful on the install, I have some bad whine between 50-65 MPH which I'm going to bring my car back into the shop to have fixed. Aside from that, wonderful product that's definitely worth the money.

    13green

    Year: 2013 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    May 16, 2014

    3:55 or 3:79

    I was trying to decide between the 3:55 or 3:79 gear kits. After a lot of extensive research on every forum I could find, I finally settled on the 3:55 gear and I'm very happy with my decision. I think this is the perfect setup for a daily driver with the 6 speed manual trans and the 3.7L V6. First gear is very short if you don't wind it out, but it is still useful. Also expect to actually have a need to use 6th gear after install. If I had an automatic V6, or a GT with a 6- speed (the GT is geared slightly differently- eg. first gear is not as low. It's 4.2:1 on the V6 vs 3.6:1 on the GT both with the 6speed manual), or if I spent more time on the drag strip than the street (mine will probably never make it to the track) I think 3:79 gears would have been my choice. But IMHO for the 3.7 L with the 6 speed manual trans as a daily driver 3:55 gears are the perfect setup and the best of both worlds (all out acceleration vs drivability as a daily driver). I also plan on adding forced induction, probably with a turbocharger, in the future. So I think 3:79 gears would be too steep for my overall build plan. In fact, had I had factory 3:31 gears instead of the 2:79 highway commuter gear setup I probably would have left it alone. On a side note I do 90-95% city driving and my mpg actually went up 1-2mpg. Overall the gears and kit themselves are top quality pieces. No howl or wine on mine, but that has more to do with install than parts. Make sure you find a shop you trust that will let you bring your own parts before you buy everything. At least in my area it was no easy task, but we'll worth my efforts. Because I saved hundreds by getting my parts from AM instead of letting the mechanic get them. Plus I also know exactly what he used and know that I have true ford racing parts.

    DcH5

    Year: 2014 Submodel: V6 Corpus Christi, TX, USA

    Helpful (1)

  • 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 (0)

  • 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 (0)

  • 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 (0)

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