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Ford Performance Ring and Pinion Gear Kit; 4.10 Gear Ratio (86-93 GT)

Item 24002G87
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$166.99

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      Product Information

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

      Features

      • Ford Racing Quality
      • Strong Forged Construction
      • 4.10 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 1986-1993 GT and 5.0 LX 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 4.10 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

      Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a new Speedometer Gear is an inexpensive way to fix this issue.

      Application. This Ford Racing Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs including the GT, 5.0 LX and Cobra models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, 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: 1986 1987 1988 1989 1990 1991 1992 1993 Details

      MPN# M-4209-88410

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

      5.0

      Customer Reviews (42)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 42 customers

      Installation Time: Full Day

      Installation Cost: $100-$250





      • February 15, 2018

        5 1988 GT - AnaG

        Gear 4.10

        Good product ,my car mustang sounds really nice ,I really love to get stuff from American muscle.

        Helpful (6)
      • December 20, 2017

        5 1986 Other - Bubba Installation Time: Full Day

        Perfect Fit

        Used these to replace 3:55 stock gears. Almost a perfect wear pattern using the original pinion shims. Doesn't get much easier than that.

        Helpful (6)
      • October 08, 2017

        5 1990 LX - Nelly1056 Installation Time: Afternoon

        4.10's shoulda been factory!

        Perfect install. I have abused them heavily at the track all summer. This car should have come factory with 4.10's! Sooo much fun!

        Helpful (6)
      • June 02, 2017

        5 1990 LX - LarryP Installation Time: Afternoon

        4.10 Gears

        Great product easy install only took about 3hrs. No noise after install. Turns about 2300 rpm at 65 with a t5.

        Helpful (6)
      • May 23, 2017

        5 1991 GT - TobyB Installation Time: Afternoon

        Great buy

        Have installed these gears before working at a ford dealership, good quality and my customers seem to like them. Bought them to replace my stock gears and to lower my quarter mile times.

        Helpful (7)
      • December 27, 2016

        5 1990 LX - BigD Installation Time: Afternoon

        4.10

        Can't say enough about the Great service from Am product arrived in California on time and was well packaged. Will continue to use American muscle in the future. 4.10 woke the car up big time feels like a rocket ship now.

        Helpful (7)
      • May 24, 2016

        5 1991 Other - rm250pro Installation Time: Shop Install Installation Cost: $250-$500

        4.10 Ford Racing Gears

        Unbelievable the difference the way the car pulls now!!!! Woke my 91 LX up big time. I feel the best mod you can do other than intake heads etc etc American Muscle shipped fast....product was great just as described. Get the bearing kit when you swap gears..... Thanks A M!!!

        Helpful (7)
      • May 29, 2015

        5 1990 Other - Andy Installation Time: Afternoon

        Ford Racing 4.10 Gears

        Great purchase for your Mustang. I have a high 9 second street driven Fox that i did the 4.10 gear install on. I do recommend a professional install, as it is crucial to properly have the gears shimmed correctly.

        Helpful (8)
      • April 04, 2013

        5 1990 Other - xshoeboxx Installation Time: Shop Install Installation Cost: $100-$250

        200 for shop install

        super nice GREAT improvement ggot a 5 speed next time ill got 3.73 my first gear is almost useless unless i wanna spin my cheater slicks like crazy 4.10 is a lil much but super fun still

        Helpful (7)
      • March 11, 2013

        5 1988 GT - AMCoalK Installation Time: Weekend

        Must have Mod!

        Great product for any Mustang. Absolutely changes the feel of the car. One of the best mods I have done!!!

        Helpful (6)

      Questions & Answers (2 answers)

      2 Top Rated Questions

      Will this ring and pinion work with all Ford 8.8 31 spline rear ends?

      • The Ford Performance 4.10 Gears are designed to work on the 86-93 V8 Mustangs that has an 8.8" rear end.

      Helpful (0)

      I'm assuming you can install these into the stock diff? I have an 88 gt

      • These Ford Performance 4.10 Gears will install into the stock 8.8" differential. We would highly recommend a rear-end installation kit with bearings, as well as friction modifier with your gear oil. The Ford Performance 4.10 Gears and Install Kit (item 100577) includes all the components for a complete installation on your application.

      Helpful (0)
      Post Your 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 1986-1993 GT


      Manual
      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 4261 5965        
      2 2516 3523 4529 5535 6542  
      3 1682 2354 3027 3700 4372 5045
      4 1264 1770 2276 2782 3287 3793
      5 847 1186 1525 1864 2203 2541


      Automatic
      Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1 3034 4248 5462 6676    
      2 1854 2596 3338 4080 4821 5563
      3 1264 1770 2276 2782 3287 3793
      4 843 1180 1517 1854 2192 2529

      Will It Fit My Mustang

      • GT - 87, 88, 89, 90, 91, 92, 93
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Other - 86

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