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USA Standard Ring and Pinion Gear Kit; 3.31 Gear Ratio (86-93 GT)

Item 402958
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Market Price $225.99 You Save 11% ($24.48)
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$201.51 (kit)

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Ship to: Ashburn - 20149
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      Product Information

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


      • Ideal for Street and Performance Applications
      • Has a 3.31 Gear Ratio
      • Comes with an 8.80 inch Ring Gear Diameter
      • 30-Spline Pinion
      • 10 Ring Gear Bolts
      • CNC-Machined Triple Alloy Steel Construction
      • Direct Fit Replacement
      • Professional Installation Recommended
      • 1-Year Limited Warranty
      • Standard Rotation
      • Fits 1986 to 1993 Ford Mustang GT Models


      Add Confidence to Your Install. The USA Standard Ring Gear and Pinion Kit features gears with 3.31 gear ratio made according to OEM specifications. This ensures that the gears deliver quality, performance, and reliability that match the Mustang’s stock parts. Furthermore, with USA Standard’s high product quality standards, these are gears that you can trust.

      Triple Alloy Steel Construction. The ring and pinion gears are CNC-machined from high-grade materials in order to ensure quality and performance. Moreover, the precision manufacturing makes these gears direct fit which helps to make installation easier.

      Recommended Upgrade. Purchasing a USA Standard installation or master overhaul kit is highly recommended for easier installation.

      Professional Installation Recommended. Re-gearing the differential is a complex process. And while the kit’s gears are a direct fit, installation by a professional mechanic is still recommended.

      Backed by 1-Year Limited Warranty. The Ring Gear and Pinion Kit with 3.31 gear ratio is warranted against manufacturing defects. Exclusions will apply.

      Application. The USA Standard Ring Gear and Pinion Kit with 3.31 gear ratio is designed to fit 1986 to 1993 Ford Mustang GT models.

      Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 Details

      USA Standard ZG F8.8-331

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring Gear
      • (1) Pinion Gear

      Customer Reviews (21)

        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
        • Other - 86

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