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SR Performance Ring Gear and Pinion Kit - 3.73 Gears (86-93 GT)

Market Price $159.99 You Save 25% ($40.00)
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$119.99

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  • Item 397883G87
  • MPN# 397883G87

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Ship to: Ashburn - 20149
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    Features & Details

    • Perfect for Street and Track Use
    • 3.73 Gear Ratio
    • 8.8" Ring Gear Diameter
    • Premium Grade 8620 Triple Alloy Steel
    • Corrosion Resistant Black Oxide Finish
    • Professional Installation Recommended
    • Fits 1987-1993 GT Mustang Models
    Improves Performance. Increase the performance of your classic 1987-1993 GT Mustang by installing a set of 3.73 SR Performance Ring and Pinion Gears. By placing your Mustang into its power band quicker, these SR Performance Gears will improve low end grunt to get you up off the line much faster.

    3.73 Gear Ratio. 3.73 gears are a great combination of performance and fuel economy that are ideal for a daily-driven Mustangs that see a lot of highway time. If you put a lot of miles on your Pony and don't want to increase your cost at the pump, a 3.73 ratio will still give you the added acceleration you want without dramatically compromising fuel economy.

    Quality Construction. SR Performance manufactures their ring and pinion gears from forged 8620 triple alloy steel for superior strength. Featuring CNC cut and lapped gear teeth, SR Performance completes their gears in a black oxide finish for long lasting corrosion resistance.

    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.

    Professional Installation Recommended. The installation of Ring and Pinon Gears can be a very intricate process, so mechanical experience is highly recommended. Follow the included instructions for best results.

    Application. This 3.73 SR Performance Ring and Pinion Gear set will fit all 1987-1993 GT Ford Mustangs equipped with a 8.8" rear end. 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

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

    What's in the Box
    • (1) Ring Gear
    • (1) Pinion Gear
    Installation Info
    Will it fit my Mustang?

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    Customer Reviews (2) Write a Review

    Overall Rating 4.5

    out of 5 stars

    Installation Time:Afternoon

    • Performance Gain 4.5 4.5
    • Fit 5 5



    • 5/5

      Installation Time: Afternoon

      July 11, 2018

      SR 3:73 gears

      Super impressed with the shipping and handling! I like that I could track the order all the waybfrom the east coast! As for the product itself, fantastic! The gears made such a huge difference from my stock 3:27s they are well made products. I am happy so far!

      JaredP

      Year: 1991 Submodel: LX

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      February 06, 2018

      GREAT GEARS

      Received on time and very easy to install. I can tell a major difference in speed and get up.

      Nicholas

      Year: 1990 Submodel: LX

      Helpful (5)

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