Eaton Detroit Truetrac Differential 31 Spline 1.32in Axle Shaft Dia Front 8.8in / Reverse Rear 8.8in - Select Ford 1983-2015

Fits select 1983-2015 Ford Aerostar, Bronco, Crown Victoria, E-Series, Mustang, Ranger, and Taurus.

The Eaton Detroit Truetrac is a helical-gear style, limited-slip differential designed to maximize wheel traction and improve handling under various driving conditions. Unlike traditional clutch-type units, the Truetrac uses a maintenance-free gear design that requires no special lubrication or friction modifiers. It operates as a standard open differential under normal conditions, automatically engaging to transfer torque to the high-traction wheel when wheel slip occurs.

Engineered for durability and quiet operation, this unit is compatible with both front 8.8-inch and reverse-cut rear 8.8-inch applications using 31-spline axle shafts with a 1.32-inch diameter. Its smooth, automatic engagement makes it an ideal traction solution for daily drivers, performance street builds, and off-road applications where consistent power delivery is required without the chatter of a locker.

• Manufacturer Part Number: 913A561
• Axle Spline Count: 31 Spline
• Axle Shaft Diameter: 1.32 inches
• Application: Fits Front 8.8" or Reverse Rear 8.8" Housings
• Differential Style: Helical Gear Limited Slip (LSD)
• Maintenance: Maintenance-free; requires no friction modifiers
• Operation: Works in both forward and reverse