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Richmond Ring and Pinion Gear Kit; 3.73 Gear Ratio (86-93 GT)

Item 66501G87
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$235.01

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      Product Information

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

      Features

      • Exceptional Quality
      • Handle Extreme Torque Applications
      • First-Run, Never Recycled Materials
      • 3.73 Gear Ratio
      • 8.8" Ring Gear Diameter
      • 2-Year / 100,000 Mile Warranty
      • Fits 1986-1993 GT, 5.0 LX and SVT Cobra

      Description

      Get Going. Looking to have some fun in your Foxbody but don't want to totally destroy your MPGs? Upgrade your rear end with a set of Richmond 3.73 Gears in your 1986-1993 5.0L and enjoy an improvement in your acceleration from a stop. These steeper gears are a great investment that'll allow your V8 Pony to get into the power band faster. One of the highest quality gears on the market, you can't go wrong with Richmond in your high performance Mustang.

      Superior Quality. Manufactured right in the United States, Richmond Gear uses only the highest standards to produce the highest quality gears in the industry. Inspected and scrutinized to deliver gears with acceptable tolerances, durability and fit, Richmond ensures only the best in machining, finishing and heat treating of their drivetrain components.

      Recommended Upgrade. When changing the gear ratio of your Mustang's rear differential, the calibration of your speedometer will no longer be accurate and will display the wrong speed. However, you can easily fix this annoying issue with a Recalibration Tool (sold separately).

      Installation Notes. An Installation and Bearing Kit is highly recommended by most installers, especially on high mileage Mustangs. Please see ordering options above.

      Warranty. Richmond Gears is so confident in the high quality of their ring and pinions that they are backed by a 2-Year / 100,000 Mile No-Nonsense Warranty.

      Application. These Richmond 3.73 Ring and Pinion Gears will fit all 1986 to 1993 V8 Ford Mustangs equipped with an 8.8" rear end.

      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 your gears are installed. See ordering options above. Note, a 28-spline S-Spring will be required for 28-spline Mustangs (sold separately) if you opt for the Trac-Lok rebuild.

      Fitment: 1987 1988 1989 1990 1991 1992 1993 Details

      Richmond 66501G87

      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 1986-1993 GT


      Manual
      Gear@25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      1387654276977   
      2228932054120503659516867
      31100%21422754336639784590
      4115016102070253129913451
      577110791387169520042312


      Automatic
      Gear@25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
      12761386549696073  
      2168723623037371243865061
      3115016102070253129913451
      476710741380168719942301
      4.9

      Customer Reviews (29)

        Reviews of Richmond Drivetrain products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

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

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