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Richmond 8.8 in. 3.55 Gears (86-93 GT)

Market Price $258.51 You Save 9% ($23.50)
Our Price

$235.01

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  • Item 66502G87
  • MPN# 66502G87

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Features & Details

  • Exceptional Quality
  • Handle Extreme Torque Applications
  • First-Run, Never Recycled Materials
  • 3.55 Gear Ratio
  • 8.8" Ring Gear Diameter
  • 2-Year / 100,000 Mile Warranty
  • Fits 1986-1993 GT, 5.0 LX and SVT Cobra
Get Going. Just because you have a Mustang that's seen over two decades of open road and fun doesn't mean you can't continue to improve its performance. Enhance acceleration and get into the power band faster in your 1986 to 1993 5.0L Foxbody with the installation of 3.55 rear gears. Crafted to handle high torque applications, these 8.8" Richmond Gears will prove to be a great upgrade.

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 3.55 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

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 3689 5165 6641      
2 2179 3050 3921 4793 5664 6536
3 1456 2038 2621 3203 3786 4368
4 1095 1533 1971 2408 2846 3284
5 733 1027 1320 1614 1907 2200


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 2627 3678 4729 5780 6831  
2 1606 2248 2890 3532 4175 4817
3 1095 1533 1971 2408 2846 3284
4 730 1022 1314 1606 1898 2190
Will it fit my Mustang?
  • Foxbody - 87, 88, 89, 90, 91, 92, 93

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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

    January 10, 2017

    Great launch

    fits perfectly in my mustang and allows much more performance out of my engine. Would reccomend

    Noah

    Year: 2006 Submodel: GT

    Helpful (1)

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