Eaton Detroit Truetrac Differential 29 Spline 1.27in Axle — Fits 1976-1986 Jeep AMC 20

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Eaton

Eaton engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Eaton lineup with fast shipping and expert fitment support — order with confidence.

Superior Traction for Your Jeep

The Eaton Detroit Truetrac is the industry-leading helical-gear style limited-slip differential. Designed to provide maximum traction in all conditions, it automatically transfers torque to the wheel with the most grip, ensuring smooth operation in both forward and reverse. Unlike clutch-based systems, the Truetrac is entirely maintenance-free and requires no special additives.

Key Features

  • Design: Helical-gear limited-slip
  • Spline Count: 29 Spline
  • Axle Diameter: 1.27-inch
  • Compatibility: Rear AMC 20 Axles
  • Operation: Fully automatic, no clutches to wear

This differential is the ultimate upgrade for Jeep CJ5, CJ7, Cherokee, and Wagoneer owners looking to conquer off-road trails or improve on-road handling. Its robust construction handles the rigors of heavy-duty use, making it ideal for both daily drivers and dedicated trail rigs. By eliminating the need for manual engagement, the Truetrac allows you to focus on the terrain ahead. Experience the seamless power delivery that only Eaton can provide. Find your perfect drivetrain upgrade at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003-2004 Hummer H1 Base
2006 Hummer H1 Alpha
2003-2009 Hummer H2 Base
2006-2009 Hummer H3 Base
2007-2009 Hummer H3 X
2008-2009 Hummer H3 Alpha
2009 Hummer H3 Championship Series
1976-1983 Jeep CJ5 Renegade
1976-1983 Jeep CJ5 Base
1977-1980 Jeep CJ5 Golden Eagle
1982-1983 Jeep CJ5 Limited
1976-1986 Jeep CJ7 Base
1976-1986 Jeep CJ7 Renegade
1977-1979 Jeep CJ7 Golden Eagle
1980 Jeep CJ7 Golden Hawk
1980-1983 Jeep CJ7 Laredo
1982-1983 Jeep CJ7 Limited
1985-1986 Jeep CJ7 Laredo
1976-1977 Jeep Cherokee S
1976-1986 Jeep Cherokee Base
1978-1980 Jeep Cherokee Wide Track
1981-1982 Jeep Cherokee Chief
1983 Jeep Cherokee Pioneer
1983 Jeep Cherokee Wide Track Chief
1985-1986 Jeep Cherokee Laredo
1985-1986 Jeep Cherokee Pioneer
1984-1985 Jeep Grand Wagoneer Limited
1981-1985 Jeep Scrambler Base
1982-1983 Jeep Scrambler SL
1982-1984 Jeep Scrambler SR
1985 Jeep Scrambler Laredo
1985 Jeep Scrambler Renegade
1976 Jeep Wagoneer Custom
1976-1982 Jeep Wagoneer Base
1979-1986 Jeep Wagoneer Limited
1984-1986 Jeep Wagoneer Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About Eaton

Eaton engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Eaton lineup with fast shipping and expert fitment support — order with confidence.

Superior Traction for Your Jeep

The Eaton Detroit Truetrac is the industry-leading helical-gear style limited-slip differential. Designed to provide maximum traction in all conditions, it automatically transfers torque to the wheel with the most grip, ensuring smooth operation in both forward and reverse. Unlike clutch-based systems, the Truetrac is entirely maintenance-free and requires no special additives.

Key Features

  • Design: Helical-gear limited-slip
  • Spline Count: 29 Spline
  • Axle Diameter: 1.27-inch
  • Compatibility: Rear AMC 20 Axles
  • Operation: Fully automatic, no clutches to wear

This differential is the ultimate upgrade for Jeep CJ5, CJ7, Cherokee, and Wagoneer owners looking to conquer off-road trails or improve on-road handling. Its robust construction handles the rigors of heavy-duty use, making it ideal for both daily drivers and dedicated trail rigs. By eliminating the need for manual engagement, the Truetrac allows you to focus on the terrain ahead. Experience the seamless power delivery that only Eaton can provide. Find your perfect drivetrain upgrade at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003-2004 Hummer H1 Base
2006 Hummer H1 Alpha
2003-2009 Hummer H2 Base
2006-2009 Hummer H3 Base
2007-2009 Hummer H3 X
2008-2009 Hummer H3 Alpha
2009 Hummer H3 Championship Series
1976-1983 Jeep CJ5 Renegade
1976-1983 Jeep CJ5 Base
1977-1980 Jeep CJ5 Golden Eagle
1982-1983 Jeep CJ5 Limited
1976-1986 Jeep CJ7 Base
1976-1986 Jeep CJ7 Renegade
1977-1979 Jeep CJ7 Golden Eagle
1980 Jeep CJ7 Golden Hawk
1980-1983 Jeep CJ7 Laredo
1982-1983 Jeep CJ7 Limited
1985-1986 Jeep CJ7 Laredo
1976-1977 Jeep Cherokee S
1976-1986 Jeep Cherokee Base
1978-1980 Jeep Cherokee Wide Track
1981-1982 Jeep Cherokee Chief
1983 Jeep Cherokee Pioneer
1983 Jeep Cherokee Wide Track Chief
1985-1986 Jeep Cherokee Laredo
1985-1986 Jeep Cherokee Pioneer
1984-1985 Jeep Grand Wagoneer Limited
1981-1985 Jeep Scrambler Base
1982-1983 Jeep Scrambler SL
1982-1984 Jeep Scrambler SR
1985 Jeep Scrambler Laredo
1985 Jeep Scrambler Renegade
1976 Jeep Wagoneer Custom
1976-1982 Jeep Wagoneer Base
1979-1986 Jeep Wagoneer Limited
1984-1986 Jeep Wagoneer Base

Product Details

Product Description

About Eaton

Eaton engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Eaton lineup with fast shipping and expert fitment support — order with confidence.

Superior Traction for Your Jeep

The Eaton Detroit Truetrac is the industry-leading helical-gear style limited-slip differential. Designed to provide maximum traction in all conditions, it automatically transfers torque to the wheel with the most grip, ensuring smooth operation in both forward and reverse. Unlike clutch-based systems, the Truetrac is entirely maintenance-free and requires no special additives.

Key Features

  • Design: Helical-gear limited-slip
  • Spline Count: 29 Spline
  • Axle Diameter: 1.27-inch
  • Compatibility: Rear AMC 20 Axles
  • Operation: Fully automatic, no clutches to wear

This differential is the ultimate upgrade for Jeep CJ5, CJ7, Cherokee, and Wagoneer owners looking to conquer off-road trails or improve on-road handling. Its robust construction handles the rigors of heavy-duty use, making it ideal for both daily drivers and dedicated trail rigs. By eliminating the need for manual engagement, the Truetrac allows you to focus on the terrain ahead. Experience the seamless power delivery that only Eaton can provide. Find your perfect drivetrain upgrade at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003-2004 Hummer H1 Base
2006 Hummer H1 Alpha
2003-2009 Hummer H2 Base
2006-2009 Hummer H3 Base
2007-2009 Hummer H3 X
2008-2009 Hummer H3 Alpha
2009 Hummer H3 Championship Series
1976-1983 Jeep CJ5 Renegade
1976-1983 Jeep CJ5 Base
1977-1980 Jeep CJ5 Golden Eagle
1982-1983 Jeep CJ5 Limited
1976-1986 Jeep CJ7 Base
1976-1986 Jeep CJ7 Renegade
1977-1979 Jeep CJ7 Golden Eagle
1980 Jeep CJ7 Golden Hawk
1980-1983 Jeep CJ7 Laredo
1982-1983 Jeep CJ7 Limited
1985-1986 Jeep CJ7 Laredo
1976-1977 Jeep Cherokee S
1976-1986 Jeep Cherokee Base
1978-1980 Jeep Cherokee Wide Track
1981-1982 Jeep Cherokee Chief
1983 Jeep Cherokee Pioneer
1983 Jeep Cherokee Wide Track Chief
1985-1986 Jeep Cherokee Laredo
1985-1986 Jeep Cherokee Pioneer
1984-1985 Jeep Grand Wagoneer Limited
1981-1985 Jeep Scrambler Base
1982-1983 Jeep Scrambler SL
1982-1984 Jeep Scrambler SR
1985 Jeep Scrambler Laredo
1985 Jeep Scrambler Renegade
1976 Jeep Wagoneer Custom
1976-1982 Jeep Wagoneer Base
1979-1986 Jeep Wagoneer Limited
1984-1986 Jeep Wagoneer Base

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