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

SKU: EAT914A538

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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.

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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.

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

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.

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

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