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Motive Gear Performance Plus Ring and Pinion Gear Kit; 3.90 Gear Ratio (10-14 GT, BOSS 302, GT500)

Item 21102G11
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      Product Information

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

      Features

      • Superior Quality
      • CNC-Cut from 8620 Gear Steel
      • 3.90 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 2010-2014 GT, BOSS and GT500 Mustangs

      Description

      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. 3.90 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 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 3.90 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

      Motive Gear F888390

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

      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+ GT


      Manual
      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


      Automatic
      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
      4.7

      Customer Reviews (100+)

        Reviews of Motive Gear Drivetrain products have an average rating of 4.7 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

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

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