USA Standard 3.90 Gears (10-14 GT)

USA Standard 3.90 Gears (10-14 GT)
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OUR PRICE$149.99
Yukon Mustang Gears and Axles
Item # 21615G11
Market Price $169.99You Save 12% ($20.00)
AmericanMuscle no longer carries the USA Standard 3.90 Gears (10-14 GT). Please check out 10-14 Mustang Gears for an updated selection.

Product Features

  • USA Standard Gear
  • Manufactured from 8620 gear steel
  • 3.90 gear ratio
  • 8.8" ring gear diameter
  • Fits 2010-2014 GT, BOSS, and Shelby GT500 Mustangs

RECOMMENDED WITH THIS PRODUCT

$149.99
Add Gear Install Kit
$97.99
Add Traction-LOK Rebuild Kit w/ Carbon Discs
$107.96
Add 8.8in Rear Gear Pinion Bearing
$59.99
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.

Application. This USA Standard Gear 3.90 Ring and Pinion Gear set will fit 11-14 GT Mustangs and 11-12 GT500 Mustangs. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

Attention 2010 and newer Mustang Owners. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please 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 2011+ GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4402 6163        
2 2923 4092 5261 6430    
3 2033 2846 3659 4472 5285 6098
4 1588 2223 2858 3493 4128 4763
5 1203 1684 2165 2646 3127 3608
6 782 1094 1407 1720 2033 2345


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 5016          
2 2814 3940 5066 6191    
3 1829 2561 3293 4024 4756 5488
4 1375 1925 2474 3024 3574 4124
5 1043 1460 1877 2294 2711 3128
6 831 1163 1496 1828 2161 2493

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:
  • GT 10, 11, 12, 13, 14
  • GT500 10, 11, 12, 13, 14
  • Boss 12, 13

About USA Standard

Yukon Mustang 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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