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Ford Performance Ring Gear and Pinion Kit - 3.55 Gears (10-14 GT)

Item 50166G11
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    Features & Details

    • Ford Racing Quality
    • Strong Forged Construction
    • 3.55 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 2010-2014 GT and 2010-2014 GT500 Mustangs
    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 11-14 Mustang GTs and 11-12 Shelby GT500s. 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: 2010 2011 2012 2013 2014 Details

    MPN# M-4209-G355A

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    Installation Info
    Tech Specs

    Approximate RPM for 2011+ GT

    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

    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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        Questions & Answers (1)

        1 Top Rated Question

        My local shop swapped out my 3:15 stock gears for FP 3:55 gears. 1st 2 times they cracked shims, the 3rd time there was a very noticeable noise/ drone from the rear end. They've ordered a new set saying what they received was defective. What could be the problem?

        • The issues you are experiencing with the Ford Performance Ring Gear and Pinion Kit could be caused by a number of issues, from incorrect installation to defective gears. Unfortunately we do not have enough information to make a solid determination, and recommend you contact our Customer Service department so we may best assist you with this issue.

        Helpful (0)
        Post Your Question

          Customer Reviews (9) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$250-$500

          • Performance Gain 4.555555 4.6
          • Fit 5 5

          • 5/5

            Installation Time: Full Day

            November 21, 2018

            Genuine FRPP gears by Motive

            What's to be said, they fit well and are quiet. Fast shipping


            Year: 2003 Submodel: GT

            Helpful (3)

          • 4/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            November 20, 2018

            2013 5.0 auto

            Great gear for the street and strip, anything steeper than this and hooking is going to be a real struggle. The car rolls out way harder than my stock 3.15's and it doesn't feel like it dies out after every shift anymore.


            Year: 2013 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Shop Install

            July 03, 2018

            Great upgrade for a 2014 GT automatic

            Noticeable upgrade in driveability and performance from the stock 3.15 ratio. A lot better in a road course by keeping it in 3rd and 4th gears and avoiding 2nd for the most part (using Select Shift) At the strip it gets into the powerband sooner but it does shift into 4th about 100 feet short of the 1/4 mile with a 7000 redline. A 7300 or 7400 redline (or taller than 27" tires) would keep you in 3rd all the way.


            Year: 2014 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            July 05, 2017


            great gear just remember if u have to replace the old pinion bearing u must get the correct one..all the local sores will sell u the wrong bearing because they dont show the correct one on the site..u must go to ford or here which is what i did and purchase the correct one for 2010 and newer mustang if this is what you are working on


            Year: 2014 Submodel: GT

            Helpful (6)

          • 4/5

            Installation Time: Afternoon

            September 09, 2014

            355 Gears over stock 331 6 speed manual 2014 5.0

            3.55 Ford Racing gears were a great overall upgrade on my 14 gt over the factory 331 gears. They improved the torque some, lowered the power band range where it starts pulling harder sooner. Not a huge drastic gain like 373 probably would have been, however I didn't want too much torque off the line and plan on doing forced induction future upgrade which then I would have required to drop to a taller gear again. Overall a nice upgrade for a bolt ons car without sacrificing your 1st gear like with getting too low of gear set on a manual.


            Year: 2014 Submodel: GT KY

            Helpful (10)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            April 25, 2014

            FORD OEM

            i always use ford gears in any of the rear axles in my mustang.


            Year: 2011 Submodel: GT pa

            Helpful (7)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $500-$1000

            March 21, 2014

            Definite upgrade from 3.15

            It is not a huge diference but noticeable. The tires did not break loose that much from adead stop before. Now they do qute easily which in some cases is fun but it does slow you down. So now bigger tires and new LCA's are needed.


            Year: 2014 Submodel: GT AZ

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            August 17, 2013

            355 GEARS FORD RACING

            A nice upgrade to your Mustang . You will feel the difference from the stock gears. The 355 is in my 2010 GT now and they will soon be installed on my 2014 5.0. Nice bang for the buck mod.


            Year: 2010 Submodel: GT nyc little neck

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            December 22, 2012

            Ford Racing 3.55 Gears

            You can always depend on Ford Racing gears for quality and performance.


            Year: 2011 Submodel: GT Gastonia, NC

            Helpful (10)

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