Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $15,000!! Enter Now

Motive Gear Performance Plus Ring and Pinion Gear Kit - 3.90 Gear Ratio (11-14 V6)

Item 21102G116
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $297.99 You Save 12% ($35.59)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Product Information

      Features, Description, Reviews, Specs & Installation


      • Superior Quality
      • CNC-Cut from 8620 Gear Steel
      • 3.90 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 2011-2014 V6 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 driveability. 3.90 gears are perfect for the Pony that needs more than 3.73s but less than 4.10s, offering a great blend of performance and efficiency.

      Superior Construction & Precision Fit.
      These Motive ring and pinon 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".

      This Motive Performance Plus 3.90 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# F888390

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (7)

      Write a Review

      Ratings Summary

      4.4 out of 5 overall rating from 7 customers

      Installation Time: Afternoon

      • December 18, 2014

        5 2011 V6 - Mariogzaa Installation Time: Afternoon

        Massive acceleration gain

        At first I didnt know if the 3.73 were enough for me so I was goong for the 4.10s and man this 3.90s are way better than both. You dont feel the fuel mileage go that high (mpg) , its definitely even better for fuel economy , I drive it everyday and this thing delivers torque drastically, improved the acceleration at low rpms , it gets speed way faster so that i can be at 1500 2100 rpms and even save more fuel than with my stock 2.73s Have this with bama tune and airaid cai... 13.4 3.7l at 1/4 mile

        Helpful (3)
      • December 06, 2012

        5 2013 V6 - lilblue13 Installation Time: Afternoon


        I was looking to make a jump from the weak 2.73 stock gears on the '13 V6 and really add some acceleration. Couldn't decide between 3.73 or 4.10 gears. The motive 3.90's were the perfect choice for daily street and highway driving. 1st gear launch is lot more ballsy. RPM's build up quick and get you flying thru the gears. 6th gear at 70 is a bit above 2g and still getting 22mpg on stock wheels. recommending getting a tuner to correct wheel and gear change so your speedometer is on point. I work in a shop so I set the gears up myself right within spec. No howl or whine during accel or coast to complain about (though I run roush exhaust). Would recommend these to anyone looking for more torque and quicker accel times. Have a pro installation done if you're unfamiliar with the job. Don't forget a pinion bearing and installation shims. GREAT PRODUCT!

        Helpful (5)
      • July 14, 2010

        3 - Matt


        Had gear professionally installed, greater acceleration and higher rpms, unfortunately the gear whines, would recommend ford racing, but they dont make a 390 so i chose motive because i wanted a 390, ill live w it

        Helpful (5)
      • June 02, 2010

        5 - chalmers

        perfect gear

        great gear not to low like 410s but still feels better then 373s.. i had gotten a rebuild kit with the gears.. i have not had any whine unless in reverse..

        Helpful (3)
      • December 05, 2009

        3 - david


        good compromise from 4.10s but have a tendency to whine.

        Helpful (4)
      • September 10, 2009

        5 - Brian

        better than 4.10s imo

        Went from stock to 4.10s. that lasted about a year. Decided to go down to 3.90s. They are definatly a much more street friendly gear, but still get up and move! 3rd redlines at about 85, and 4th is around 115, so you'll definatly still have plenty of oomph to blow past the slow traffic on the freeway-

        Helpful (5)
      • October 09, 2007

        5 - Travis

        Great get up and go.

        I feel that these are the great in between gears to have. I didn\'t want 3.73\\\'s but I didn\'t want 4.10\\\'s either. You will get a great improvement when you hit the throttle.

        Helpful (4)

      Questions & Answers (0 answers)

      No questions about this product yet.

      Ask the First Question

      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

      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 4402 6163        
      2 2923 4092 5261 6430    
      3 2033 2846 3659 4472 5285 6098
      4 1588 2223 2858 3493 4128 4763
      5 1203 1684 2165 2646 3127 3608
      6 782 1094 1407 1720 2033 2345

      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 5016          
      2 2814 3940 5066 6191    
      3 1829 2561 3293 4024 4756 5488
      4 1375 1925 2474 3024 3574 4124
      5 1043 1460 1877 2294 2711 3128
      6 831 1163 1496 1828 2161 2493

      Will It Fit My Mustang

          Related Mustang Categories