Detroit Locker 913A589 Truetrac Limited Slip Differential Dana 44 30-Spline

The Detroit Locker 913A589 Truetrac is a helical gear limited-slip differential designed for Dana 44 axles with 30-spline axle shafts and 3.73:1 or numerically lower gear ratios. This maintenance-free differential uses a patented parallel-axis planetary helix gear design to provide smooth, automatic torque splitting without the friction plates, cones, or springs found in traditional limited-slip differentials.

Key Features:

• Helical gear design for quiet, automatic torque distribution
• 30-spline configuration for Dana 44 axles
• Compatible with 3.73:1 and lower (numerically) gear ratios
• Maintenance-free operation with no clutch packs to wear out
• Smooth power transfer that goes unnoticed during normal driving
• Automatically transfers torque to the wheel with better traction
• Steel construction for durability
• For use with non-thick ring gears only

Specifications:

• Axle Type: Dana 44 (front or rear)
• Spline Count: 30
• Axle Shaft Diameter: 1.31 inches
• Ring Gear Size: 8.5 inches
• Gear Ratio Compatibility: 3.73 and down
• Cover Bolts: 10
• Material: Steel (SCM 420)

Installation Notes:

Eaton recommends using petroleum/mineral-based GL-5 80W90 gear oil for all Truetrac differentials. Do not use synthetic gear oil or friction modifiers. The Truetrac performs like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when conditions warrant. Sold individually.