Eaton Detroit Truetrac Differential 30 Spline 1.28in Axle Shaft Diameter 2.76-4.56 Ratio Rear 8.75in

If you're looking to improve traction and handling in your classic rear-wheel-drive Mopar, the Eaton Detroit Truetrac differential is a solid choice. This helical-gear limited-slip unit automatically sends power to the wheel with the most grip, enhancing acceleration and stability without any special maintenance. It's designed to work smoothly and quietly in both forward and reverse, making it a versatile upgrade for a wide array of vehicles, including models like the 1966-1974 Dodge Charger, 1957-1974 Chrysler New Yorker, and 1960-1974 Dodge Dart.

The Truetrac uses a unique, gear-based design that doesn't rely on clutches or friction modifiers, meaning it requires no special fluids and is virtually maintenance-free. This makes it a very practical solution for maximizing performance on the street or track. It's built to handle a variety of gear ratios, specifically fitting those between 2.76 and 4.56, and works with 30-spline axles that have a 1.28-inch diameter. This differential is designed for 8.75-inch rear axles, a common setup in many classic Mopar applications.

When installing this differential, ensure your axle housing is clean and that you have the correct tools for setting gear backlash and preload. While it's a direct replacement for the factory differential in many applications, it's always a good idea to consult the manufacturer's installation guide for specific torque values and procedures. This unit is a popular choice for enthusiasts looking for improved performance and reliability without the complexity of other limited-slip systems.