A open differential sends all available torque to whichever rear wheel has the least grip, which is exactly the wheel that spins first on a wet road, a dirt trail, or a hard launch. The Detroit Truetrac replaces the open differential with a helical-gear limited-slip design that biases torque to the wheel with traction automatically, with no clutches or cones to wear out and no on-off engagement feel in daily driving.

Eaton 912A587 Features:

• Helical-gear design engages automatically in both forward and reverse with no clutches, cones, or friction modifiers to wear out.
• Fits 9 in. rear axle housings.
• 28 spline output with a 1.20 in. axle shaft diameter.
• Covers 3.25 and Up Ratio ring gear pinion ratio range.
• Maintenance-free operation - no special lubricants or friction modifiers required.
• Smooth, quiet engagement with no on/off feel or driveline shock.