Eaton Detroit Truetrac Differential 30 Spline 14 Bolt — Fits 1972-2006 GM Trucks

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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.

Watch in action

Ultimate Traction for GM 14-Bolt Axles

The Eaton Detroit Truetrac is the gold standard for limited-slip differentials, now available for the legendary GM 10.5-inch 14-bolt rear axle. This helical-gear differential is designed to provide maximum traction without the need for manual engagement or complex maintenance. By continuously biasing torque to the wheel with the most grip, it ensures your truck maintains forward momentum in challenging terrain, wet weather, or heavy-towing scenarios.

Key Features

  • Axle Compatibility: GM 10.5-inch 14-Bolt
  • Spline Count: 30 Spline
  • Ratio Compatibility: 4.10 and Down
  • Design: Helical-gear, maintenance-free
  • Performance: Smooth, automatic torque distribution

Designed for a wide range of vehicles, including the Chevrolet Astro, C20 Suburban, and various G-Series vans, this Truetrac unit is built for durability. It is the perfect upgrade for enthusiasts who demand a reliable, street-friendly differential that can still perform under pressure. Whether you are restoring a classic truck or upgrading a work vehicle, the Truetrac provides the peace of mind that comes with superior traction. Explore the full range of performance drivetrain upgrades available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1985-1995 Chevrolet Astro CL
1985-1995 Chevrolet Astro CS
1985-2005 Chevrolet Astro Base
1987-2005 Chevrolet Astro LT
1996-2005 Chevrolet Astro LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Scottsdale
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1996-2012 Chevrolet Express 1500 Base
1996-2012 Chevrolet Express 1500 LS
2001-2002 Chevrolet Express 1500 LT
2006-2012 Chevrolet Express 1500 LT
1996-2012 Chevrolet Express 2500 Base
1996-2012 Chevrolet Express 2500 LS
2006-2012 Chevrolet Express 2500 LT
1996-2012 Chevrolet Express 3500 Base
1996-2012 Chevrolet Express 3500 LS
2006-2012 Chevrolet Express 3500 LT
1975-1995 Chevrolet G10 Beauville
1975-1995 Chevrolet G10 Chevy Van
1975-1995 Chevrolet G10 Sportvan
1981-1984 Chevrolet G10 Bonaventure
1983 Chevrolet G10 Base
1986-1987 Chevrolet G10 Bonaventure
1972-1974 Chevrolet G10 Van Base
1972-1974 Chevrolet G10 Van Sportvan
1975-1995 Chevrolet G20 Beauville
1975-1995 Chevrolet G20 Chevy Van
1975-1995 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base
1972-1974 Chevrolet G30 Van Sportvan
1988-1992 Chevrolet K3500 Scottsdale
1988-1998 Chevrolet K3500 Cheyenne
1988-1998 Chevrolet K3500 Silverado
1994-1997 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 LS

…and 146 additional fitments. Contact us to confirm yours.

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.

Watch in action

Ultimate Traction for GM 14-Bolt Axles

The Eaton Detroit Truetrac is the gold standard for limited-slip differentials, now available for the legendary GM 10.5-inch 14-bolt rear axle. This helical-gear differential is designed to provide maximum traction without the need for manual engagement or complex maintenance. By continuously biasing torque to the wheel with the most grip, it ensures your truck maintains forward momentum in challenging terrain, wet weather, or heavy-towing scenarios.

Key Features

  • Axle Compatibility: GM 10.5-inch 14-Bolt
  • Spline Count: 30 Spline
  • Ratio Compatibility: 4.10 and Down
  • Design: Helical-gear, maintenance-free
  • Performance: Smooth, automatic torque distribution

Designed for a wide range of vehicles, including the Chevrolet Astro, C20 Suburban, and various G-Series vans, this Truetrac unit is built for durability. It is the perfect upgrade for enthusiasts who demand a reliable, street-friendly differential that can still perform under pressure. Whether you are restoring a classic truck or upgrading a work vehicle, the Truetrac provides the peace of mind that comes with superior traction. Explore the full range of performance drivetrain upgrades available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1985-1995 Chevrolet Astro CL
1985-1995 Chevrolet Astro CS
1985-2005 Chevrolet Astro Base
1987-2005 Chevrolet Astro LT
1996-2005 Chevrolet Astro LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Scottsdale
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1996-2012 Chevrolet Express 1500 Base
1996-2012 Chevrolet Express 1500 LS
2001-2002 Chevrolet Express 1500 LT
2006-2012 Chevrolet Express 1500 LT
1996-2012 Chevrolet Express 2500 Base
1996-2012 Chevrolet Express 2500 LS
2006-2012 Chevrolet Express 2500 LT
1996-2012 Chevrolet Express 3500 Base
1996-2012 Chevrolet Express 3500 LS
2006-2012 Chevrolet Express 3500 LT
1975-1995 Chevrolet G10 Beauville
1975-1995 Chevrolet G10 Chevy Van
1975-1995 Chevrolet G10 Sportvan
1981-1984 Chevrolet G10 Bonaventure
1983 Chevrolet G10 Base
1986-1987 Chevrolet G10 Bonaventure
1972-1974 Chevrolet G10 Van Base
1972-1974 Chevrolet G10 Van Sportvan
1975-1995 Chevrolet G20 Beauville
1975-1995 Chevrolet G20 Chevy Van
1975-1995 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base
1972-1974 Chevrolet G30 Van Sportvan
1988-1992 Chevrolet K3500 Scottsdale
1988-1998 Chevrolet K3500 Cheyenne
1988-1998 Chevrolet K3500 Silverado
1994-1997 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 LS

…and 146 additional fitments. Contact us to confirm yours.

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.

Watch in action

Ultimate Traction for GM 14-Bolt Axles

The Eaton Detroit Truetrac is the gold standard for limited-slip differentials, now available for the legendary GM 10.5-inch 14-bolt rear axle. This helical-gear differential is designed to provide maximum traction without the need for manual engagement or complex maintenance. By continuously biasing torque to the wheel with the most grip, it ensures your truck maintains forward momentum in challenging terrain, wet weather, or heavy-towing scenarios.

Key Features

  • Axle Compatibility: GM 10.5-inch 14-Bolt
  • Spline Count: 30 Spline
  • Ratio Compatibility: 4.10 and Down
  • Design: Helical-gear, maintenance-free
  • Performance: Smooth, automatic torque distribution

Designed for a wide range of vehicles, including the Chevrolet Astro, C20 Suburban, and various G-Series vans, this Truetrac unit is built for durability. It is the perfect upgrade for enthusiasts who demand a reliable, street-friendly differential that can still perform under pressure. Whether you are restoring a classic truck or upgrading a work vehicle, the Truetrac provides the peace of mind that comes with superior traction. Explore the full range of performance drivetrain upgrades available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1985-1995 Chevrolet Astro CL
1985-1995 Chevrolet Astro CS
1985-2005 Chevrolet Astro Base
1987-2005 Chevrolet Astro LT
1996-2005 Chevrolet Astro LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Scottsdale
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1996-2012 Chevrolet Express 1500 Base
1996-2012 Chevrolet Express 1500 LS
2001-2002 Chevrolet Express 1500 LT
2006-2012 Chevrolet Express 1500 LT
1996-2012 Chevrolet Express 2500 Base
1996-2012 Chevrolet Express 2500 LS
2006-2012 Chevrolet Express 2500 LT
1996-2012 Chevrolet Express 3500 Base
1996-2012 Chevrolet Express 3500 LS
2006-2012 Chevrolet Express 3500 LT
1975-1995 Chevrolet G10 Beauville
1975-1995 Chevrolet G10 Chevy Van
1975-1995 Chevrolet G10 Sportvan
1981-1984 Chevrolet G10 Bonaventure
1983 Chevrolet G10 Base
1986-1987 Chevrolet G10 Bonaventure
1972-1974 Chevrolet G10 Van Base
1972-1974 Chevrolet G10 Van Sportvan
1975-1995 Chevrolet G20 Beauville
1975-1995 Chevrolet G20 Chevy Van
1975-1995 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base
1972-1974 Chevrolet G30 Van Sportvan
1988-1992 Chevrolet K3500 Scottsdale
1988-1998 Chevrolet K3500 Cheyenne
1988-1998 Chevrolet K3500 Silverado
1994-1997 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 Base
1999-2000 Chevrolet K3500 LS

…and 146 additional fitments. Contact us to confirm yours.

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