Motive Performance Plus 3.90 Gears (05-09 GT)

Motive Performance Plus 3.90 Gears (05-09 GT)
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OUR PRICE$239.99
Motive Mustang Gears
Item # 21102G05
Market Price $271.19You Save 12% ($31.20)
Ships the same business day

Product Features

  • Superior quality
  • CNC-cut from 8620 gear steel
  • 3.90 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For street or track use
  • Fits 2005-2009 GT, Bullitt and GT500 Mustangs

RECOMMENDED WITH THIS PRODUCT

$239.99
Add Gear Install Kit
$84.99
Add Traction-LOK Rebuild Kit w/ Carbon Discs
$107.96
Add 2010 8.8in Rear Gear Pinion Bearing
$59.99
Total Price: $239.99
Improve Overall Performance. A set of Motive Performance gears will wake up your Pony and get it moving faster off the line. Steeper gears are a great way to lower quarter mile times and improve responsiveness without sacrificing driveability. 3.90 gears are perfect for the Pony that needs more than 3.73s but less than 4.10s, offering a great blend of performance and efficiency.

Superior Construction & Precision Fit. These Motive ring and pinon gears are CNC cut from high grade 8620 gear steel, and factory lapped for precision fit. Each set is hardness tested prior to leaving the factory to ensure the highest quality. Unlike other brands, Motive Gears do not have a reputation for "gear whine".

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 Motive Performance Plus 3.90 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. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

Approximate RPM for 2005-2010 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4065 5691        
2 2405 3368 4330 5292 6254  
3 1588 2223 2858 3493 4128 4763
4 1203 1684 2165 2646 3127 3608
5 818 1145 1472 1799 2126 2453


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3873 5422 6971      
2 2754 3856 4957 6059    
3 1852 2593 3334 4075 4816 5556
4 1203 1684 2165 2646 3127 3608
5 854 1195 1537 1879 2220 2562

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 05, 06, 07, 08, 09
  • GT500 07, 08, 09
  • Bullitt 08, 09

About Motive

Motive Mustang Gears
Celebrating Their 65th year of serving the Automotive Aftermarket, no one is more committed to providing the highest quality part available today than Motive Gears. Their distinct divisions provide for excellent market focus while maintaining their massive combined purchasing power to provide the best products for the highest value with the best service in the industry.

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