Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications. Detroit Truetrac Differential Ford and Jeep Dana 44 1977-79 Ford Truck 1969-2012 Jeep 30-Spline Axles 8.5" Diameter Ring Gear Fits 3.73 & Lower Gear Ratios Application Dana 44 Wrangler JK (non-Rubicon) Wrangler Dana 44 Various Dana 44
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