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USA Standard 4.56 Gears (86-93 GT)

AmericanMuscle no longer carries the USA Standard 4.56 Gears (86-93 GT). Please check out 1979-1993 Foxbody Mustang Gears for an updated selection.
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$149.99

  • Item #21617G87
  • Market Price $169.99
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AmericanMuscle no longer carries the USA Standard 4.56 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
  • 4.56 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 4.56 Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs including the GT, LX 5.0 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 4739 6635        
2 2798 3918 5037 6156    
3 1870 2618 3366 4115 4863 5611
4 1406 1969 2531 3094 3656 4219
5 942 1319 1696 2073 2450 2826


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3375 4725 6075      
2 2062 2887 3712 4537 5362 6187
3 1406 1969 2531 3094 3656 4219
4 937 1312 1687 2062 2437 2812
Fitment
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93

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  • 5 Stars 1.0 100%
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5.0

out of 5 stars

1 Customer Recommends this Product

Installation Time:Afternoon

  • Performance Gain: 5 5/5
  • Fit: 5 5/5
  • Bang For Your Buck: 5 5/5
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  • 5/5

    great quality

    July 01, 2013

    Fit on this was perfect easy to set up and no noise as others have said. Would recomend US STANDARD GEAR TO ANYONE 10 stars

    alles33

    Year: 1993 Model: Other Driving Style: Daily Driver dallas tx

    Helpful (0) (0)

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