GM 8.5/8.6 in 30 spline.Detroit Truetrac

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.

Notes:Eaton differentials require special bearings. For 1999 and prior- bearing LM102949 and race LM102911 are required. (2.89 O.D. race) For applications 1999 and newer with race O.D. of 3.06 in. bearing LM603049 and race LM603012 are required.