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USA Standard 4.56 Gears (05-09 GT)

AmericanMuscle no longer carries the USA Standard 4.56 Gears (05-09 GT). Please check out 2005-2009 Mustang Gears for an updated selection.
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$149.99

  • Item #21617G05
  • Market Price $169.99
  • You Save 12% ($20.00)
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AmericanMuscle no longer carries the USA Standard 4.56 Gears (05-09 GT). Please check out 2005-2009 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 2005-2009 GT, Bullitt, and Shelby GT500 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 Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

Application. This USA Standard Gear 4.56 Ring and Pinion Gear set will fit all 2005 to 2010 V8 Mustangs including the GT, Bullitt and GT500 models. 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.

Mustang Fitment: 2005 2006 2007 2008 2009 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
Installation Info
Tech Specs

Approximate RPM for 2005-2010 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4753 6654        
2 2812 3937 5062 6187    
3 1856 2599 3341 4084 4826 5569
4 1406 1969 2531 3094 3656 4219
5 956 1339 1721 2104 2486 2869


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4528 6339        
2 3220 4508 5796      
3 2166 3032 3898 4764 5630 6497
4 1406 1969 2531 3094 3656 4219
5 998 1398 1797 2197 2596 2995
Fitment
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09
  • GT500 - 07, 08, 09

Customer Photos

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5.0

out of 5 stars

1 Customer Recommends this Product

Installation Time:Shop Install

Installation Cost:$250-$500

  • Performance Gain: 5 5/5
  • Fit: 4 4/5
  • Bang For Your Buck: 5 5/5
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  • 5/5

    USA Standard 4.56 gears

    November 25, 2013

    Let me start out by saying that 4.56 gears are perfect for cruising and not to tall of a gear! I'm 18, a senior in high school, and I drive a 2005 mustang gt automatic and on a south Florida highway at 80 mph it cruises at 3000 rpm. The only other mods I have are a rebuilt differential, spectre 4.00 inch intake, bama tune, and flowmaster 40 series axle backs. When I stomp the gas the car spins threw all 3 gears and chirps 4th gear at 70 mph and it gets their fast! In the Florida heat spinning off the line on stock size tires my best time was a 8.85 @ 82.56 mph with a 2.01 60 ft time and a buddy in the car in an 1/8th mile at immokalee international drag way. When the car was bone stock it ran a best time of 9.41 @ 76.88. I highly recommend this product the only thing is you need a notches x ion or grind teeth off the gear like I had done. Other than that I drive 6000 miles so far with no problems just solid hard launches!

    Faststang281

    Year: 2005 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Naples, florida

    Helpful (0) (0)

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