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USA Standard 3.73 Gears (86-93 GT)

AmericanMuscle no longer carries the USA Standard 3.73 Gears (86-93 GT). Please check out 1979-1993 Foxbody Mustang Gears for an updated selection.
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$149.99

  • Item #21614G87
  • Market Price $169.99
  • You Save 12% ($20.00)
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AmericanMuscle no longer carries the USA Standard 3.73 Gears (86-93 GT). Please check out 1979-1993 Foxbody Mustang Gears for an updated selection.

Features
  • USA Standard Gear
  • Manufactured from 8620 gear steel
  • 3.73 gear ratio
  • 8.8" ring gear diameter
  • Fits 1986-1993 LX 5.0, GT, and SVT Cobra Mustangs
Description
Wake Up Your Pony. Installing a set of steeper gears is a great way to get your Mustang into the power band quicker for improved low end torque and faster acceleration off the line. A set of USA Standard Gears will really wake up your Pony. Better Than OEM Quality. Using state-of-of-the-art equipment and manufacturing techniques USA Standard Ring & Pinion sets are made to higher than OEM standards from high grade 8620 gear steel and are backed by a one year warranty.

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.

Application. This USA Standard Gear Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs including the GT, 5.0 LX and 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.

Mustang Fitment: 1986 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 3876 5427 6977      
2 2289 3205 4120 5036 5951 6867
3 1100% 2142 2754 3366 3978 4590
4 1150 1610 2070 2531 2991 3451
5 771 1079 1387 1695 2004 2312


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 2761 3865 4969 6073    
2 1687 2362 3037 3712 4386 5061
3 1150 1610 2070 2531 2991 3451
4 767 1074 1380 1687 1994 2301
Fitment
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93

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