Detroit Locker 912A585 Truetrac Limited-Slip Differential for Dana 30 - 27 Spline

The Detroit Locker 912A585 Truetrac is a helical-gear style limited-slip differential designed specifically for Dana 30 front axles with 27-spline shafts. This high-performance differential maximizes wheel traction while maintaining smooth, quiet operation during everyday driving conditions.

Advanced Helical Gear Technology:

Unlike traditional clutch-type limited-slip differentials, the Truetrac utilizes parallel-axis planetary helical gears that require no maintenance and have no wearable parts. The differential operates as an open differential under normal driving conditions, allowing wheels to rotate at different speeds for smooth cornering. When a wheel loses traction, gear separation forces automatically transfer torque to the wheel with better grip—up to 3.5 times more torque to the high-traction wheel.

Key Features:

• Designed for Dana 30 axles with 27-spline shafts
• Compatible with 3.73 and higher gear ratios
• Forged and heat-treated case construction for maximum strength
• Maintenance-free operation—no clutches to wear out
• Automatic engagement with no driver input required
• Smooth, progressive torque transfer
• No friction modifiers required
• Operates silently in forward and reverse
• One-year manufacturer warranty

The Detroit Truetrac differential is ideal for off-road enthusiasts, towing applications, and performance driving. It provides superior traction without the harshness or driveline binding associated with full mechanical lockers, making it an excellent choice for vehicles that see both street and trail use.