Eaton Detroit Truetrac 33-Spline Limited Slip Differential — Fits Chevy Astro & Avalanche

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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 Chevy Trucks and Vans

Take control of your vehicle's power with the Eaton Detroit Truetrac 33-spline limited-slip differential. Designed for heavy-duty applications including the Chevrolet Astro and Avalanche, this helical-gear differential provides the traction you need for towing, off-roading, or daily driving. By automatically biasing torque to the wheel with better grip, the Truetrac ensures you maintain momentum in challenging conditions.

Engineered for Performance

  • Helical-Gear Technology: Eliminates the need for friction plates, providing a maintenance-free solution that never needs rebuilding.
  • 33-Spline Strength: Built to handle the torque output of larger engines, perfect for the 9.25-inch front or 9.5-inch rear axle setups.
  • Seamless Operation: Provides smooth, quiet engagement that is virtually unnoticeable during normal driving but aggressive when you need it.
  • Increased Reliability: Designed to withstand the stress of heavy loads and varying terrain, ideal for the Chevy Avalanche and Astro platforms.

The Detroit Truetrac is the preferred choice for enthusiasts who want a "set it and forget it" traction solution. Unlike lockers that can be harsh or limited-slips that wear out, the Truetrac offers the perfect balance of on-road manners and off-road capability. Whether you are navigating a snowy driveway or pulling a trailer, this differential keeps your wheels turning. Invest in the longevity and performance of your Chevy's drivetrain with this premium upgrade from 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
2007-2012 Chevrolet Avalanche LS
2007-2012 Chevrolet Avalanche LT
2007-2012 Chevrolet Avalanche LTZ
2013 Chevrolet Avalanche Black Diamond LS
2013 Chevrolet Avalanche Black Diamond LT
2013 Chevrolet Avalanche Black Diamond LTZ
2002-2003 Chevrolet Avalanche 1500 North Face
2002-2003 Chevrolet Avalanche 1500 On Road Edition
2002-2005 Chevrolet Avalanche 1500 Base
2002-2006 Chevrolet Avalanche 1500 Z71
2003 Chevrolet Avalanche 1500 WBH
2004-2006 Chevrolet Avalanche 1500 Z66
2005-2006 Chevrolet Avalanche 1500 LT
2005-2006 Chevrolet Avalanche 1500 LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1988-1992 Chevrolet C1500 Scottsdale
1988-1998 Chevrolet C1500 Silverado
1988-1998 Chevrolet C1500 Cheyenne
1990-1993 Chevrolet C1500 454 SS
1990-1998 Chevrolet C1500 WT
1994-1997 Chevrolet C1500 Base
1999 Chevrolet C1500 LS
1997 Chevrolet C1500 Suburban LT
1997-1999 Chevrolet C1500 Suburban Base
1997-1999 Chevrolet C1500 Suburban LS
1999 Chevrolet C1500 Suburban LT
1979-1980 Chevrolet C20 Custom Deluxe
1979-1981 Chevrolet C20 Cheyenne
1979-1986 Chevrolet C20 Scottsdale
1979-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1979-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Scottsdale
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 C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1996-1997 Chevrolet C2500 Suburban Base
1996-1997 Chevrolet C2500 Suburban LS
1996-1997 Chevrolet C2500 Suburban LT
1996-2014 Chevrolet Express 1500 Base
1996-2014 Chevrolet Express 1500 LS

…and 279 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 Chevy Trucks and Vans

Take control of your vehicle's power with the Eaton Detroit Truetrac 33-spline limited-slip differential. Designed for heavy-duty applications including the Chevrolet Astro and Avalanche, this helical-gear differential provides the traction you need for towing, off-roading, or daily driving. By automatically biasing torque to the wheel with better grip, the Truetrac ensures you maintain momentum in challenging conditions.

Engineered for Performance

  • Helical-Gear Technology: Eliminates the need for friction plates, providing a maintenance-free solution that never needs rebuilding.
  • 33-Spline Strength: Built to handle the torque output of larger engines, perfect for the 9.25-inch front or 9.5-inch rear axle setups.
  • Seamless Operation: Provides smooth, quiet engagement that is virtually unnoticeable during normal driving but aggressive when you need it.
  • Increased Reliability: Designed to withstand the stress of heavy loads and varying terrain, ideal for the Chevy Avalanche and Astro platforms.

The Detroit Truetrac is the preferred choice for enthusiasts who want a "set it and forget it" traction solution. Unlike lockers that can be harsh or limited-slips that wear out, the Truetrac offers the perfect balance of on-road manners and off-road capability. Whether you are navigating a snowy driveway or pulling a trailer, this differential keeps your wheels turning. Invest in the longevity and performance of your Chevy's drivetrain with this premium upgrade from 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
2007-2012 Chevrolet Avalanche LS
2007-2012 Chevrolet Avalanche LT
2007-2012 Chevrolet Avalanche LTZ
2013 Chevrolet Avalanche Black Diamond LS
2013 Chevrolet Avalanche Black Diamond LT
2013 Chevrolet Avalanche Black Diamond LTZ
2002-2003 Chevrolet Avalanche 1500 North Face
2002-2003 Chevrolet Avalanche 1500 On Road Edition
2002-2005 Chevrolet Avalanche 1500 Base
2002-2006 Chevrolet Avalanche 1500 Z71
2003 Chevrolet Avalanche 1500 WBH
2004-2006 Chevrolet Avalanche 1500 Z66
2005-2006 Chevrolet Avalanche 1500 LT
2005-2006 Chevrolet Avalanche 1500 LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1988-1992 Chevrolet C1500 Scottsdale
1988-1998 Chevrolet C1500 Silverado
1988-1998 Chevrolet C1500 Cheyenne
1990-1993 Chevrolet C1500 454 SS
1990-1998 Chevrolet C1500 WT
1994-1997 Chevrolet C1500 Base
1999 Chevrolet C1500 LS
1997 Chevrolet C1500 Suburban LT
1997-1999 Chevrolet C1500 Suburban Base
1997-1999 Chevrolet C1500 Suburban LS
1999 Chevrolet C1500 Suburban LT
1979-1980 Chevrolet C20 Custom Deluxe
1979-1981 Chevrolet C20 Cheyenne
1979-1986 Chevrolet C20 Scottsdale
1979-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1979-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Scottsdale
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 C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1996-1997 Chevrolet C2500 Suburban Base
1996-1997 Chevrolet C2500 Suburban LS
1996-1997 Chevrolet C2500 Suburban LT
1996-2014 Chevrolet Express 1500 Base
1996-2014 Chevrolet Express 1500 LS

…and 279 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 Chevy Trucks and Vans

Take control of your vehicle's power with the Eaton Detroit Truetrac 33-spline limited-slip differential. Designed for heavy-duty applications including the Chevrolet Astro and Avalanche, this helical-gear differential provides the traction you need for towing, off-roading, or daily driving. By automatically biasing torque to the wheel with better grip, the Truetrac ensures you maintain momentum in challenging conditions.

Engineered for Performance

  • Helical-Gear Technology: Eliminates the need for friction plates, providing a maintenance-free solution that never needs rebuilding.
  • 33-Spline Strength: Built to handle the torque output of larger engines, perfect for the 9.25-inch front or 9.5-inch rear axle setups.
  • Seamless Operation: Provides smooth, quiet engagement that is virtually unnoticeable during normal driving but aggressive when you need it.
  • Increased Reliability: Designed to withstand the stress of heavy loads and varying terrain, ideal for the Chevy Avalanche and Astro platforms.

The Detroit Truetrac is the preferred choice for enthusiasts who want a "set it and forget it" traction solution. Unlike lockers that can be harsh or limited-slips that wear out, the Truetrac offers the perfect balance of on-road manners and off-road capability. Whether you are navigating a snowy driveway or pulling a trailer, this differential keeps your wheels turning. Invest in the longevity and performance of your Chevy's drivetrain with this premium upgrade from 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
2007-2012 Chevrolet Avalanche LS
2007-2012 Chevrolet Avalanche LT
2007-2012 Chevrolet Avalanche LTZ
2013 Chevrolet Avalanche Black Diamond LS
2013 Chevrolet Avalanche Black Diamond LT
2013 Chevrolet Avalanche Black Diamond LTZ
2002-2003 Chevrolet Avalanche 1500 North Face
2002-2003 Chevrolet Avalanche 1500 On Road Edition
2002-2005 Chevrolet Avalanche 1500 Base
2002-2006 Chevrolet Avalanche 1500 Z71
2003 Chevrolet Avalanche 1500 WBH
2004-2006 Chevrolet Avalanche 1500 Z66
2005-2006 Chevrolet Avalanche 1500 LT
2005-2006 Chevrolet Avalanche 1500 LS
2002-2004 Chevrolet Avalanche 2500 Base
2005-2006 Chevrolet Avalanche 2500 LS
2005-2006 Chevrolet Avalanche 2500 LT
1988-1992 Chevrolet C1500 Scottsdale
1988-1998 Chevrolet C1500 Silverado
1988-1998 Chevrolet C1500 Cheyenne
1990-1993 Chevrolet C1500 454 SS
1990-1998 Chevrolet C1500 WT
1994-1997 Chevrolet C1500 Base
1999 Chevrolet C1500 LS
1997 Chevrolet C1500 Suburban LT
1997-1999 Chevrolet C1500 Suburban Base
1997-1999 Chevrolet C1500 Suburban LS
1999 Chevrolet C1500 Suburban LT
1979-1980 Chevrolet C20 Custom Deluxe
1979-1981 Chevrolet C20 Cheyenne
1979-1986 Chevrolet C20 Scottsdale
1979-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1979-1980 Chevrolet C20 Suburban Custom Deluxe
1979-1980 Chevrolet C20 Suburban Scottsdale
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 C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1996-1997 Chevrolet C2500 Suburban Base
1996-1997 Chevrolet C2500 Suburban LS
1996-1997 Chevrolet C2500 Suburban LT
1996-2014 Chevrolet Express 1500 Base
1996-2014 Chevrolet Express 1500 LS

…and 279 additional fitments. Contact us to confirm yours.

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