Differential carriers are a key part of the drivetrain system in heavy duty semi trucks, responsible for housing the gears and bearings that manage wheel torque and rotation. These carriers are engineered to withstand the high demands of heavy-duty applications, ensuring efficient distribution of power across the axle. They come in various designs to fit different truck models and configurations, providing a crucial role in maintaining vehicle performance and stability. Regular inspection and proper maintenance of differential carriers are essential for keeping the drivetrain operating smoothly.