Eaton Detroit Truetrac Differential, 31-Spline, Ford 9-Inch Rear, 3.25 and Up Ratio - Part 913A586

The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle. Detroit Truetrac® Differential; 31 Spline; Rear 9.0 in.; 1.32 in. Axle Shaft Diameter; 3.25 And Up Ring Gear Pinion Ratio;

• Optimized Torque Bias Ratios Deliver Max Acceleration And Handling
• No Special Lubrication Or Friction Modifiers Needed
• Helical Gear Limited Slip Differential
• Durable; Smooth; Quiet Operation
• Works In Forward And Reverse
• Ideal For Most Vehicles
• Automatic Engagement

The Eaton Detroit Truetrac differential is a helical-gear limited-slip differential designed to improve traction, acceleration, and handling across a wide range of vehicles. Its automatic operation helps transfer torque to the wheel with greater available traction without requiring driver input, delivering predictable performance in forward and reverse.

Designed for rear Ford 9-inch applications, the Eaton Detroit Truetrac 913A586 accommodates 31-spline axle shafts with a 1.32-inch axle shaft diameter and is intended for ring gear and pinion ratios of 3.25 and higher. Its maintenance-free design requires no special lubrication or friction modifiers, simplifying installation and long-term service requirements when used with the appropriate differential lubricant specified for the vehicle.

The helical-gear design provides smooth, quiet operation while helping maximize usable traction during acceleration and cornering. Automatic engagement makes the Detroit Truetrac a practical solution for performance vehicles, street-driven applications, trucks, and other vehicles requiring enhanced traction without the abrupt engagement commonly associated with locking differentials. The Eaton brand and proven Detroit Truetrac design provide a durable, versatile upgrade for compatible rear axle assemblies.

What's Included: One Eaton Detroit Truetrac limited-slip differential. Installation hardware, bearings, seals, lubricant, and axle components are not included unless supplied by the vehicle or axle manufacturer. Verify axle configuration, spline count, shaft diameter, carrier compatibility, and gear ratio before installation.

Features:

• Optimized torque bias ratios help improve acceleration and handling by directing torque toward the wheel with greater traction.
• Helical-gear limited-slip design provides smooth, quiet, and durable operation without abrupt locking engagement.
• Maintenance-free construction requires no special lubrication or friction modifiers when used with the correct differential lubricant.
• Automatic engagement operates in forward and reverse, making it suitable for a wide range of compatible vehicle applications.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1