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USA Standard Ring Gear and Pinion Kit - 3.55 Gears (05-09 GT)

Market Price $169.99 You Save 12% ($20.00)
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$149.99

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  • Item 21613G05
  • MPN# ZG F8.8-355

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    Features & Details

    • USA Standard Gear
    • Manufactured from 8620 Gear Steel
    • 3.55 Gear Ratio
    • 8.8" Ring Gear Diameter
    • Fits 2005-2009 GT, Bullitt, and Shelby GT500 Mustangs
    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 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.

    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 3700 5180 6660      
    2 2190 3065 3941 4817 5693 6569
    3 1445 2023 2601 3179 3757 4335
    4 1095 1533 1971 2408 2846 3284
    5 744 1042 1340 1638 1936 2233


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3525 4935 6345      
    2 2507 3510 4513 5515 6518  
    3 1686 2360 3035 3709 4383 5058
    4 1095 1533 1971 2408 2846 3284
    5 777 1088 1399 1710 2021 2332
    Will it fit my Mustang?

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