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Motive Gear Performance Plus Ring Gear and Pinion Kit - 3.73 Gears (10-14 GT, BOSS 302, GT500)

Item 21105G11
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Market Price $252.99 You Save 12% ($29.73)
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    Features & Details

    • Superior Quality
    • CNC-Cut from 8620 Gear Steel
    • 3.73 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 2010-2014 GT, BOSS and GT500 Mustangs
    Improve Overall Performance. A set of Motive Performance gears will wake up your Pony and get it moving faster off the line. Steeper gears are a great way to lower quarter mile times and improve responsiveness without sacrificing drivability. 3.73 gears is a great addition to daily driver, automatic transmission Mustangs, offering a superior combination of performance without sacrificing fuel economy.

    Superior Construction & Precision Fit. These Motive ring and pinion gears are CNC cut from high grade 8620 gear steel and factory lapped for precision fit. Each set is hardness tested prior to leaving the factory to ensure the highest quality. Unlike other brands, Motive Gears do not have a reputation for "gear whine."

    Application. This Motive Performance Plus 3.73 Ring and Pinion Gear set will fit 2010-2014 GT, BOSS and GT500 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. Due to this, installation 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# F888373

    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 4210 5894        
    2 2795 3913 5031 6149    
    3 1944 2722 3499 4277 5054 5832
    4 1518 2126 2733 3340 3948 4555
    5 1150 1610 2070 2531 2991 3451
    6 748 1047 1346 1645 1944 2243

    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4798 6717        
    2 2692 3768 4845 5922 6998  
    3 1750 2449 3149 3849 4549 5249
    4 1315 1841 2367 2892 3418 3944
    5 997 1396 1795 2194 2593 2992
    6 795 1113 1431 1749 2067 2384
    Will it fit my Mustang?

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        Questions & Answers (1)

        1 Top Rated Question

        Fit 2011-2014 V6? Will these gears fit a 2012 V6? Its seems most/all other gears seem to be interchangeable since it has a 8.8" rear. Thanks.

        • As long as you have the 8.8, the Motive Performance Plus 3.73 Gears (10-14 GT, GT500) would work for your V6! They do use the same gear, we just separate it on the website for simplicity's sake.

        Helpful (0)
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          Customer Reviews (6) Write a Review

          Overall Rating 4.5

          out of 5 stars

          Installation Time:Afternoon

          • Performance Gain 5 5
          • Fit 5 5

          • 5/5

            Installation Time: Afternoon

            March 09, 2018

            Should be near the top of your list

            I have several of the usual mods on my 2013 GT (Boss 302 intake, CAI, long tube headers, SCT tuner, etc), but I can tell you without question that the gears have made the biggest impact on acceleration. I've experienced small increases with each change to the car, but the 3.73 felt like a quantum leap. It's really effective in turning that increased horsepower into acceleration you can feel. I used a professional ring and pinion shop for the install, and have no whine at all. Best money I've spent so far.


            Year: 2013 Submodel: GT

            Helpful (3)

          • 5/5

            November 09, 2017

            Awesome service

            Bought motive 3.73 gears and I love them they have super fast shipping and great service


            Year: 2014 Submodel: GT

            Helpful (3)

          • 2/5

            July 02, 2011


            the gear helped my 60 ft but it is very load howling noise. the installer told me i should have used ford gears. a waist of money im going ford gears for there 250.00 installation

            mike woodcock

            Year: 2011 Submodel: GT

            Helpful (5)

          • 5/5

            February 19, 2011

            great product

            I love these gears I would tell anyone who asked to get these for there car .The install was fairly easy just remember to buy a complete install kit and when doing the install keep parts that you use again marked and they go back to where they came from.


            Helpful (6)

          • 5/5

            February 20, 2010

            Good bang for your buck

            I bought these gears about 3 years ago and they are very nice. there isnt gear whine like richmond as long as they are both shimmed correctly. you can def feel the get up and go vs the stockers. You will have to buy either a speed cal or new speedo gear if you have a mechanical speedo.

            Kris p.

            Helpful (6)

          • 5/5

            August 10, 2008

            Great product

            This gear is perfect for all around driving, and doesnt whine like other gears and definately has the pickup when you want it!!!


            Helpful (6)

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