Motive Performance Plus 4.10 Gears (79-85 V8)

Motive Performance Plus 4.10 Gears (79-85 V8)
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About Motive

Motive 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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OUR PRICE$169.99
Market Price $179.99You Save 6% ($10.00)
Item # 21101G87
(4.4/5)14 Reviews
Ships the same business day
Add 7.5in Bearing Kit
PRICE WITH OPTIONS $169.99
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Product Features

  • Superior quality
  • CNC-cut from 8620 gear steel
  • 4.10 Gear Ratio
  • 7.5" Ring Gear Diameter
  • For street or track use
  • Fits 1979-1985 V8 Mustangs
Improve Performance. Wake up your V8-powered pony for faster acceleration off the line with a set of 4.10 Motive Performance Plus gears. A steeper set of gears will get you into your power band faster for faster launches and more punch off the line.

Superior Construction. 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.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a new Speedometer Gear is an inexpensive way to fix this issue.

Application. This Motive Performance Plus Ring and Pinion Gear set will fit all 1979 to 1985 V8 Ford Mustangs equipped with a 7.5" rear end. 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.

Approximate RPM for 1979-1985 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4261 5965        
2 2516 3523 4529 5535 6542  
3 1682 2354 3027 3700 4372 5045
4 1264 1770 2276 2782 3287 3793
5 847 1186 1525 1864 2203 2541


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3034 4248 5462 6676    
2 1854 2596 3338 4080 4821 5563
3 1264 1770 2276 2782 3287 3793
4 843 1180 1517 1854 2192 2529

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:
  • Foxbody 79, 80, 81, 82, 83, 84, 85

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