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Ford Performance Ring and Pinion Gear Kit - 3.55 Gear Ratio (11-14 V6)

Item 50166G116
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features

      • Ford Racing Quality
      • Strong Forged Construction
      • 3.55 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 2011-2014 V6 Mustangs

      Description

      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. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

      Superior Quality.
      These Ford Racing 3.55 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

      Application.
      This Ford Racing Ring and Pinion Gear set will fit all 2011-2014 V6 Mustangs. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

      Attention 2010 and newer Mustang Owners.
      Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

      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: 2011 2012 2013 2014 Details

      MPN# M-4209-G355A

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      4.8

      Customer Reviews (23)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 23 customers

      Installation Time: Weekend

      Installation Cost: $500-$1000





      • July 24, 2019

        5 2014 V6 - RichW Installation Time: Afternoon

        Great ratio

        Just switched out gears, finally able to use 6th gear, great fun to drive!!!

        Helpful (0)
      • April 04, 2019

        5 2012 V6 - Guscabrices

        Great price and great fit

        Great customer service as well. The 3.55 gears ready made a differing the1/8 mile. Really quick v6 mustang Real sleeper. Can’t wait for my shorty headers

        Helpful (0)
      • January 29, 2019

        5 2014 V6 - Antonio Installation Time: Full Day

        WOW

        It is a complete night and day difference from the 2.73 gears I had that came with the car. It feels like an entirely different car. I would highly recommend these

        Helpful (1)
      • April 27, 2018

        5 2011 V6 - Bigdan Installation Time: Shop Install Installation Cost: $500-$1000

        Ford ring and pinion

        They fit great and work great performance gain was great. tought me a lesson only use ford parts my car took up a rack in a small shop for a week getting the parts exchanged so it cost me and extera $200 in labor

        Helpful (4)
      • January 30, 2018

        5 2014 V6 - Adam Installation Time: Afternoon

        WICKED

        I BOUGHT THESE GEARS AS THE FINAL PRODUCT TO MY MUSTANG (I HAVE A LOT OF MODS) AND I HAVE TO SAY... WOW! I NEVER ONCE FELT A DIFFERENCE IN ANY OTHER PART THAT I ADDED TO MY CAR BECAUSE, LET'S BE HONEST, IT'S HARD TO REALLY FEEL ANY GAINS WITH ANYTHING UNTIL YOU PAIR IT ALL TOGETHER WITH A TUNE... WELL I DID EXACTLY THAT AND MY CAR HAS NEVER BEEN THE SAME! IT IS A COMPLETELY DIFFERENT MUSTANG. DON'T LISTEN TO OVER-EXAGGERATED REVIEWS FROM OTHER PEOPLE ON OTHER PARTS. GET THESE GEARS AND A TUNER FIRST IF YOU REALLY WANT TO FEEL A DIFFERENCE AND REAL POWER. AS FOR THE INSTALL, I HAD A PROFESSIONAL DO IT AND I HAVE HAD NO GEAR WHINE WHATSOEVER BECAUSE I GAVE MY CAR THE PROPER BREAK IN PERIOD OF 500 MILES. GET THESE GEARS! THEY ARE AMAZING!

        Helpful (8)
      • September 12, 2017

        5 2014 V6 - Snoggatog Installation Time: Shop Install Installation Cost: $500-$1000

        Should of come stock

        I bought these because I have a 30 minute drive to school but i wanted my v6 to have a little bit more low end torque than a flat head screwdriver. I had a speed shop instal it for 500 bucks with some worry of gear wine. But these gears are as quite as stock. It makes the quality of driving incredibly better than the stock 2.73's i had. It doesn't bog down if you hit the gas from a red light or up hills anymore So the exhaust tone improved from before. As in mpg i average 24 on the high way going 65 at 2 grand rpm. The performance gains were very noticeable off the line when you hit the gas and spins tires way easier. Its a completely different car.

        Helpful (8)
      • February 15, 2017

        5 2014 V6 - AK

        Ford Performance 3.55 Gears

        My V6 was pretty much a snail on the line. It did take a while just to get going. That completely changed with these 3.55s. I did not want to go to aggressive since it is still my daily, so the 3.55s are perfect for me. The car is definitely a lot more responsive. If you plan to get this, make sure you get the rear end installation kit.

        Helpful (7)
      • October 18, 2016

        5 2014 V6 - Vsilv

        3.55 Gears

        The install was not difficult and didn't take more than 1.5 hours. Would recommend

        Helpful (7)
      • March 06, 2016

        5 2014 V6 - rm1063 Installation Time: Afternoon

        Awsum Mod!!

        After having the 3:55 gear installed it has made my takeoffs and passing through traffic so much better than the factory 2:73,I am very happy with the purchase.Thanks AM-another great product and price!

        Helpful (5)
      • February 29, 2016

        4 2012 V6 - TJ Installation Time: Afternoon

        Decent performance increase

        This modification was much needed over the 2.73. I have also installed the solid one piece drive shaft as well. To start it off, I am using my 2nd Bama performance tune. The first would keep me in 1st until 3k RPM...awesome performance, less great for mpg especially annoying/jerky in parking lots and slow spots. Unfortunately I do have a small amount of noticeable gear whine in 1st, and reverse is...like whoa. People have actually asked about it while riding with me. I attribute this to the install though and it in no way reflects negatively on the part. Honestly, it doesn't bother me...but from what I have read is that once driven like this for a bit...its permanent. So, be aware of that. I used all Ford Racing parts/kit and bearings etc for install and Royal Purple fluid. Nitty gritty, performance increase is FOR SURE noticeable. I half wish I would have chosen the 3.73, but this is good as I do a few miles on the highway every day to work and back. For those saying no notice in mpg...they are lying, or just not tracking it very well. I track my mileage religiously. After my other upgrades I was averaging 22-23mpg driving normally, but getting on it somewhat often. After new shaft/gears lowest is around 18.5-19 I just drove like a grandma for a week (mostly 2.5k rpm starts and no excessive playing at higher speeds) and the results are in. I filled up around a quarter tank and averaged 20.94mpg. At this point if I use a full tank I may average 21-21.5. I do a lot of city cruising 45-50 and limited interstate driving at 70-75. A lot depends on the tune you use as well. I am more near factory shift points than not. With a typical tune for this ratio from Bama, expect less mileage. Though, the performance is much better off the line compared to the more stock tune I use now. All in all, if you are thinking about this just do it. The 3.31 may not be enough of a kick to make it worth it, yet the 3.73 may reduce your mileage a lot if you drive on the highway often. The 3.55 is a good in between for performance/mileage and I am mostly satisfied with it in those regards. If you have the extra coinage, have a dealership install it. A Ford dealership will guarantee 3 year 36k mile and there will be no whine. My local dealers wanted $750 and one wanted $1100 (JUST labor) I paid $400. I am very happy, and this along with the shaft are the best upgrades I have done to date.

        Helpful (7)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      Is it necessary to upgrade my driveshaft swapping from 2.73 Gears to 3.55 Gears. Several shops say yes, some say no. 2011 V6 3.7 6-speed Man.

      • When installing a Ford Performance Ring Gear and Pinion Kit, upgrading the driveshaft is not required, however we highly recommend a solid one piece driveshaft on 2011-2014 V6 models, for two reasons. First, and the most important, is that the OEM driveshafts on the 11-14 V6 models are prone to failure, and Second, the one piece driveshaft will also be significantly lighter, which is great for performance.

      Helpful (0)

      Is the rear gear pinion bearing really necessary when changing gears or can i get away with just the installation kit?

      • If you have a 2011 and up Mustang, you will need the Ford Rear Gear Pinion Bearing - 8.8 in. (10-14 V8; 11-14 V6), item # 52994, (http://www.americanmuscle.com/88-gear-assembly-2010.html) for proper installation.

      Helpful (0)

      Is the rear gear pinion bearing really necessary when changi gears?

      • You will be required to purchase a new gear pinion bearing when you switch out the ring and pinion gears in any 2010 and newer Mustang as Ford has changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs.

      Helpful (0)

      Is it required for your car to be tuned after the install? If so, what tuner should I go with?

      • I would recommend after the Ford Performance 3.55 Gears (11-14 V6) is installed. Also the tuner that I would suggest is going with the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (11-14 V6) item #101200G116 (www.americanmuscle.com/x4-custom-tuner-2011v6.html). With this BAMA tuner, when you purchase it, you are automatically enrolled into free custom tunes for as long as you own your vehicle!

      Helpful (0)

      Break-in period Is there a break-in period when you install these gears. If so, how many miles? 1st time having a gear change to a car.

      • Yes up to 150 miles or so. try not to go racing or highway use right away, the bearing and new parts need to settle in, you don't want to over heat it.

      Helpful (0) Show 1 more answer
      Post Your Question
      2 More Questions
      What is the fuel mileage impact? I'm interested in doing a gear swap but am afraid that the MPG impact may be to great. What is the loss of mpg's both in town and interstate driving? Say 70 mph average. Thanks for your help on this. 3 answers
      Odometer How do you get the odometer to adjust after installing gears? I have a tuner from this site will a flash do it ? And does it void my warranty? 4 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring gear
      • (1) Pinion gear

      Tech Specs

      Approximate RPM for 2011+ V6


      Manual
      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 4007 5610        
      2 2660 3724 4788 5838 6917  
      3 1850 2590 3330 4070 4810 5550
      4 1445 2023 2601 3179 3757 4335
      5 1095 1533 1971 2408 2846 3284
      6 712 996 1281 1565 1850 2135


      Automatic
      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 4566 6393        
      2 2562 3586 4611 5636 6660  
      3 1665 2331 2997 3663 4329 4995
      4 1251 1752 2252 2753 3253 3754
      5 949 1329 1708 2088 2468 2847
      6 756 1059 1362 1664 1967 2269

      Will It Fit My Mustang

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