Eaton Detroit Truetrac Helical Gear Limited Slip Differential

The Eaton Detroit Truetrac is the automotive aftermarket's premier helical gear-type limited slip differential, delivering intelligent, automatic traction enhancement without the maintenance demands or long-term degradation of traditional clutch-based designs. Backed by Eaton's decades of drivetrain engineering expertise and a proven track record across a vast range of vehicle applications, the Truetrac sets the benchmark in gear-driven limited slip technology.

How It Works:

The Truetrac's patented parallel-axis planetary helical gear design provides quiet, automatic torque splitting under all driving conditions. Under normal circumstances, it operates seamlessly as a standard open differential. When a wheel loses traction, gear separation forces engage automatically and redirect torque to the wheel with grip — no driver input, switches, or electronic connections required. Once traction is restored, the differential instantly resumes normal open-differential operation.

Key Features:

• Patented helical gear design eliminates wear-prone clutch packs and friction plates entirely
• Fully automatic operation — no external controls, driver intervention, or electronic integration needed
• Transfers up to 3.5× more torque to the high-traction wheel when conditions demand it
• Smooth, quiet performance with no chatter, harsh engagement, or objectionable noise
• Maintenance-free construction — torque bias is maintained for the full service life of the unit
• Functions correctly in both forward and reverse
• Fully compatible with ABS and electronic traction control systems
• Available for front axles, rear axles, and inter-axle drive systems
• Engineered to handle the extreme torque loads demanded by professional racing, off-road, and heavy-duty applications

Unlike conventional limited slip differentials that lose effectiveness as clutch packs wear, the Truetrac's all-gear construction delivers consistent, peak performance over its entire service life. The high-strength helical gear mechanism uses input torque to generate a proportional separating force, allowing the unit to instantly sense and respond to traction loss without accumulating mechanical wear over time.

The Detroit Truetrac is a field-proven solution trusted by automotive enthusiasts, professional builders, and OEM engineers alike. Its optimal balance of traction capability, long-term durability, whisper-quiet operation, and low total cost of ownership makes it the differential of choice for trucks, SUVs, off-road vehicles, muscle cars, and performance builds across a broad range of axle platforms.