Eaton Detroit Truetrac Helical Gear Limited Slip Differential

1994–2002 Dodge Ram 2500 / Dodge Ram 3500 Rear Dana 60

913A390

Overview:

The Eaton Detroit Truetrac is a premium helical gear limited slip differential designed to maximize traction and improve vehicle handling in a variety of driving conditions. Engineered specifically for the rear Dana 60 axle of 1994 to 2002 Dodge Ram 2500 and Ram 3500 trucks, this differential enhances wheel grip without the need for driver intervention or special maintenance. Its maintenance-free design ensures smooth, quiet, and reliable operation both forward and in reverse, making it an ideal upgrade for truck owners seeking improved performance and safety on and off the road.

Whether you are towing heavy loads, navigating slippery terrain, or simply looking to improve your truck’s acceleration and cornering capabilities, the Detroit Truetrac provides consistent torque biasing to optimize traction where it’s needed most. This differential is a trusted solution for enthusiasts and professionals who demand durability and enhanced drivability from their drivetrain components.

Key Features:

The Eaton Detroit Truetrac combines advanced engineering with robust construction to deliver superior traction and performance. Key features include:

• Helical gear design for smooth, automatic limited slip operation without clutches or cones
• Maintenance-free with no special lubrication or friction modifiers required
• Optimized torque bias ratios that improve acceleration and handling under various driving conditions
• Durable construction engineered to withstand the rigors of heavy-duty use in Dodge Ram 2500 and 3500 trucks
• Quiet operation with minimal noise compared to traditional limited slip differentials
• Works effectively in both forward and reverse directions for consistent traction
• Fits rear Dana 60 axles with 30 spline, 1.31-inch diameter axle shafts
• Compatible with ring gear and pinion ratios of 4.56 and higher

Construction & Design:

The Detroit Truetrac is built with precision-machined helical gears that provide a smooth and progressive torque transfer between wheels. Unlike clutch-type limited slip differentials, the Truetrac’s gear-driven design eliminates the need for wear-prone friction plates, resulting in a maintenance-free and longer-lasting component. The robust internal gearing is crafted from high-strength materials to endure the demanding conditions of heavy-duty trucks, including towing, hauling, and off-road driving.

Its compact design fits seamlessly into the Dana 60 rear axle housing, maintaining factory axle geometry and ensuring compatibility with existing drivetrain components. Eaton’s engineering focus on durability and reliability makes the Truetrac a dependable upgrade for Dodge Ram owners seeking enhanced traction without sacrificing smoothness or quiet operation.

Installation & Fitment:

The Eaton Detroit Truetrac is a direct-fit replacement for the rear Dana 60 differential in 1994–2002 Dodge Ram 2500 and Ram 3500 models. Installation requires standard differential service procedures and should be performed by a qualified technician to ensure proper setup and preload. No special modifications or additional components are necessary, making it a straightforward upgrade for those looking to improve traction and drivability.

Because it is designed to work with ring gear and pinion ratios of 4.56 and up, verify your axle ratio compatibility before installation. The Truetrac’s automatic engagement means it requires no driver input or adjustments once installed, providing seamless operation from the moment it is fitted.

What's Included:

• Eaton Detroit Truetrac limited slip differential assembly (30 spline)
• Installation instructions
• Warranty information

Ideal For:

This differential is ideal for Dodge Ram 2500 and 3500 owners who demand improved traction and handling without the maintenance hassles of traditional limited slip units. It is especially suited for:

• Heavy-duty towing and hauling applications
• Off-road enthusiasts requiring reliable traction in challenging terrain
• Drivers seeking enhanced acceleration and cornering stability
• Fleet and commercial vehicles needing durable, maintenance-free drivetrain components

Eaton produces well-known performance drivetrain solutions—especially differentials and supporting install components—designed to help put power down more effectively. Eaton is also recognized for performance automotive supercharger technology (including TVS systems) used in various high-performance applications where consistent airflow and traction are critical.