USA Standard 4.56 Gears (86-93 GT)

USA Standard 4.56 Gears (86-93 GT)
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OUR PRICE$149.99
Yukon Gears and Axles
Item # 21617G87
Market Price $169.99You Save 12% ($20.00)
AmericanMuscle no longer carries the USA Standard 4.56 Gears (86-93 GT). Please check out 79-93 Mustang Gears for an updated selection.

Product 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

RECOMMENDED WITH THIS PRODUCT

$149.99
Add Gear Install Kit
$99.99
Add Traction-LOK Rebuild Kit w/ Carbon Discs
$107.96
Total Price: $149.99
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.

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

Installation Time:

(approx) 4 Hours

Difficulty Level:

Mechanical expertise or professional installation required.

What's in the box?

  • (1) Ring gear
  • (1) Pinion gear

Installation Guides:

What's in the box?

  • (1) Ring gear
  • (1) Pinion gear
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Fitment:
  • Foxbody 86, 87, 88, 89, 90, 91, 92, 93

About USA Standard

Yukon Gears and Axles
Yukon Gear and Axle build quality parts that exceed expectation, it’s that simple! Yukons in-house engineering team utilizes state-of-the-art computer software to design expectational products that are manufactured in partnership with some of the world’s foremost leaders in OEM manufacturing. Only after rigorous testing and intense quality control inspection can it earn the name Yukon.

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