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Richmond Ring Gear and Pinion Kit - 4.56 Gears (86-93 GT)

Market Price $267.21 You Save 9% ($24.29)
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  • Item 66500G87
  • MPN# 66500G87

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Ship to: ASHBURN - 20146
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    Features & Details

    • Exceptional Quality
    • Handle Extreme Torque Applications
    • First-Run, Never Recycled Materials
    • 4.56 Gear Ratio
    • 8.8" Ring Gear Diameter
    • 2-Year / 100,000 Mile Warranty
    • Fits 1986-1993 GT, 5.0 LX and SVT Cobra
    Enhanced Performance. If you want to get your V8 Foxbody to pull off the line faster, upgrade your rear end with high quality Richmond 8.8" 4.56 Gears. This gear ratio is perfect for the 1987-1993 V8 Pony owner who loves muscle cars and wants to get into the power band faster for lower ETs and quicker quarters.

    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 Tuner or 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. Due to this high numeric gear ratio, it will require a notched gear cross pin for proper installation.

    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 4.56 Ring and Pinion Gears will fit all 1986 to 1993 V8 Ford Mustangs equipped with a 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

    What's in the Box
    • (1) Ring Gear
    • (1) Pinion Gear
    Installation Info
    Tech Specs

    Approximate RPM for 1986-1993 GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4739 6635        
    2 2798 3918 5037 6156    
    3 1870 2618 3366 4115 4863 5611
    4 1406 1969 2531 3094 3656 4219
    5 942 1319 1696 2073 2450 2826


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3375 4725 6075      
    2 2062 2887 3712 4537 5362 6187
    3 1406 1969 2531 3094 3656 4219
    4 937 1312 1687 2062 2437 2812
    Will it fit my Mustang?

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    Customer Reviews (1) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Afternoon

    • Performance Gain 5 5
    • Fit 5 5



    • 5/5

      Installation Time: Afternoon

      December 29, 2016

      Race day ready

      Big gear crazy launching Good for beefed up mustangs or if u wanna make ur stickstock quicker put this

      JULIAN

      Year: 1989 Submodel: GT

      Helpful (2)

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