Eaton 915A568 Detroit Truetrac Helical Gear Limited Slip Differential - AAM 11.5 Inch, 30 Spline

The Eaton Detroit Truetrac is a helical-gear style limited slip differential that maximizes wheel traction and enhances driving performance. As the first helical gear differential introduced to the automotive aftermarket under the Eaton brand, the Truetrac remains the industry-leading choice for reliable, maintenance-free traction control.

How It Works: The Detroit Truetrac operates as a standard open differential under normal driving conditions, allowing wheels to rotate at different speeds during turns. When traction loss occurs, the helical gear separation forces automatically transfer torque to the wheel with better grip. The system can transfer up to 3.5 times more torque to the high-traction wheel, maintaining a consistent torque bias ratio throughout its lifetime.

Key Features:

• AAM 11.5-inch ring gear diameter application with 30 spline axles
• Compatible with all gear ratios and 1.55-inch axle shaft diameter
• Patented parallel-axis planetary helix gear design for quiet, smooth operation
• Completely maintenance-free with no wearable clutch packs or friction discs
• Forged and heat-treated cases with high-strength helical gearing
• Fully automatic operation in both forward and reverse
• No friction modifiers required for installation
• Retains torque bias characteristics for the life of the differential

Lubrication Requirements: Use petroleum-based GL-5 rated 80W-90 gear oil. Do not use synthetic oils or friction modifiers, as they can reduce differential performance.

Application Note: This unit is designed for the 14-bolt rear axle configuration commonly found in GM and Dodge heavy-duty trucks. The Truetrac is engineered to be the strongest component in your axle assembly, designed to handle extreme torque loads typical in professional racing and military applications.

Backed by Eaton's one-year manufacturer's warranty against defects. The Detroit Truetrac delivers proven performance for street driving, towing, off-road use, and racing applications where smooth, automatic traction control is essential.