EXCEL from Richmond Ring and Pinion Gear Kit; 3.90 Gear Ratio (86-93 Mustang GT)Find parts that fit my vehicle

Improve Off The Line Acceleration. Has your 5.0L Mustang always felt a little sluggish from a standing start? If so, it is probably because of the lower ratio gear and pinion installed by Ford at the factory. Most 5.0L Mustangs came equipped with 3.08 or 3.27 gears, which are fine for daily drivers who are looking for good fuel economy, but not for the hardcore performance enthusiast. By installing a set of higher ratio 3.90 gears your Mustang will enter its power band quicker which will improve low end torque for faster off the line acceleration.

Superior Quality. Richmond proudly manufactures their Ring and Pinion Gear Sets right here in the USA. Using state-of-the-art manufacturing processes and extensive quality control testing, Richmond produces a superior quality Ring and Pinion Gear Set at an excellent price. Richmond is so confident in the quality of their products that they back them with a 6 month, 50,000 mile no-nonsense warranty. 

Recommended Upgrade. Please note that when changing the gear ratio of your Mustangs rear differential that the calibration of your speedometer will no longer be correct and will display the wrong speed. However, you can easily fix this annoying issue with a new Speedometer Gear (sold separately).

Application. This 3.90 ratio Richmond Excel Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs equipped with an 8.8" solid axle rear end, including the GT, 5.0 LX, and SVT 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 Ford Mustang
• 1987 Ford Mustang
• 1988 Ford Mustang
• 1989 Ford Mustang
• 1990 Ford Mustang
• 1991 Ford Mustang
• 1992 Ford Mustang
• 1993 Ford Mustang

Details

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