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Ford Racing 3.73 Gear, Ring and Pinion Installation Kit (79-85 V8)

AmericanMuscle no longer carries the Ford Racing 3.73 Gear, Ring and Pinion Installation Kit (79-85 V8). Please check out 1979-1993 Foxbody Mustang Gear Kits for an updated selection.
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$274.99

  • Item #102141G87
  • Market Price $329.99
  • You Save 17% ($55.00)
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AmericanMuscle no longer carries the Ford Racing 3.73 Gear, Ring and Pinion Installation Kit (79-85 V8). Please check out 1979-1993 Foxbody Mustang Gear Kits for an updated selection.

Features
  • Convenient combo kit
  • Perfect for street or track use
  • Strong forged construction
  • 3.73 gear ratio - 7.5" ring gear diameter
  • 7.5" rear end installation and bearing kit
  • Genuine Ford Racing Parts
  • Fits 1979-1985 V8 Mustangs with 7.5" solid rear axle
Description
Improve ET's And Low End Torque. Are you looking to get more low end grunt off the line and lower your ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, gaskets, seals, shims, bearings and all the required hardware.

Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. These Ford Racing 3.73 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

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 Ford Racing 3.73 Gear, Ring and Pinion Installation Kit will fit all 1979 to 1985 V8 Mustang models equipped with a 7.5" rear end.

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: 1979 1980 1981 1982 1983 1984 1985 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
  • Shelby GT500 high-torque pinion bearings
  • Pinion and carrier shims
  • Crush sleeve
  • Pinion nut
  • Pinion seal
  • Ring gear bolts
  • Heavy duty carrier bearings
  • Gear-marking compound
  • Cover gasket
Installation Info
Tech Specs

Approximate RPM for 1979-1985 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3876 5427 6977      
2 2289 3205 4120 5036 5951 6867
3 1100% 2142 2754 3366 3978 4590
4 1150 1610 2070 2531 2991 3451
5 771 1079 1387 1695 2004 2312


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 2761 3865 4969 6073    
2 1687 2362 3037 3712 4386 5061
3 1150 1610 2070 2531 2991 3451
4 767 1074 1380 1687 1994 2301
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85

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