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USA Standard 4.10 Gears (99-04 GT)

AmericanMuscle no longer carries the USA Standard 4.10 Gears (99-04 GT). Please check out 1999-2004 Mustang Gears for an updated selection.
2 Reviews
Our Price

$149.99

  • Item #21616G99
  • Market Price $169.99
  • You Save 12% ($20.00)
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AmericanMuscle no longer carries the USA Standard 4.10 Gears (99-04 GT). Please check out 1999-2004 Mustang Gears for an updated selection.

Features
  • USA Standard Gear
  • Manufactured from 8620 gear steel
  • 4.10 gear ratio
  • 8.8" ring gear diameter
  • Fits 1999-2004 GT, Bullitt, Mach 1, 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 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 1999 to 2004 V8 Mustangs including the GT, Bullitt, Mach 1 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: 1999 2000 2001 2002 2003 2004 Details

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

Approximate RPM for 1999-2004 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4274 5983        
2 2529 3540 4552 5563 6575  
3 1669 2337 3004 3672 4339 5007
4 1264 1770 2276 2782 3287 3793
5 860 1204 1548 1891 2235 2579


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3591 5027 6463      
2 1960 2744 3528 4311 5095 5879
3 1264 1770 2276 2782 3287 3793
4 885 1239 1593 1947 2301 2655
Fitment
  • Bullitt - 01
  • Mach 1 - 03, 04
  • Cobra - 99, 01, 03, 04
  • GT - 99, 00, 01, 02, 03, 04

Most Helpful Reviews View All

Overall Rating 4/5 Write a Review
5/5
Don't Fear the Gear!

I was torn between 3.73, 3.90, and 4.10 gearing for the rear. I couldn't decide which would be better for my daily driven mustang. I went for the 4.10 and didn't look back. Best bang for buck mod so far!

Read More
Helpful (0) (0)

3/5
Awesome but very whiney

The gears are awesome except that they are very loud and whiney. Even louder than my flow master exhaust. I have a 99 mustang gt con and I can't stand how loud they are. They did fit perfectly and the

Read More
Helpful (0) (0)

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Reviews (2) Write a Review

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4.0

out of 5 stars

2 Customers Recommend this Product

Installation Time:Afternoon

  • Performance Gain: 5 5/5
  • Fit: 5 5/5
  • Bang For Your Buck: 5 5/5
Filter By Sort By
  • 5/5

    Don't Fear the Gear!

    January 07, 2013

    I was torn between 3.73, 3.90, and 4.10 gearing for the rear. I couldn't decide which would be better for my daily driven mustang. I went for the 4.10 and didn't look back. Best bang for buck mod so far! When they say it wakes up your mustang, they are not kidding. Highway rpms didn't bother me too much as long as I keep it at 60mph and I love that fifth has become a more usable gear around town.

    DesMan23

    Year: 2003 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Wichita, KS, USA

    Helpful (0) (0)

  • 3/5

    Awesome but very whiney

    December 22, 2012

    The gears are awesome except that they are very loud and whiney. Even louder than my flow master exhaust. I have a 99 mustang gt con and I can't stand how loud they are. They did fit perfectly and the power gain was incredible.

    pondit

    Year: 1999 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Albany, GA, USA

    Helpful (0) (0)

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