All Eaton differentials made for General Motors 8.5" and 8.6" axles require special bearings. For axles with small bearing bores (race O.D. or 2.89"), usually found on vehicles prior to 1999, bearing LM102949 and race LM102911 are required. For axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999 to present, bearing LM603049 and race LM603012 are required.
Axle shaft diameter
Limited Slip (LSD)
Gear spline tooth count
Ring gear size
Ring gear ratio
2.73 & up
Off-Road: Work Truck / Towing On Road: Work Truck / Towing Off-Road: Light Trail / Sand Sports On Road: Street and Muscle On Road: Restoration On Road: Drag Racing On Road: Circle Track
Eaton’s mission is to improve the quality of life and the environment through the use of power management technologies and services. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power – more safely, more efficiently and more reliably. Eaton’s 2019 revenues were $21.4 billion, and we sell products to customers in more than 175 countries.