Center shaft vented CVJ

A drivetrain assembly for a motor vehicle comprising,

• an output shaft,
• a propeller shaft having an end fitting affixed to a distal end of the propeller shaft,
• a constant velocity joint interposed between the output shaft and the propeller shaft for allowing torque to be transferred between the output shaft and the propeller shaft and allowing at least a limited degree of angular and longitudinal relative displacement between the output shaft and the propeller shaft, the output shaft forming splines meshing with mating splines of an inner race of the constant velocity joint,
• a sealing boot affixed to the output shaft and the end fitting for sealing and protecting internal components of the constant velocity joint, the sealing boot, the end fitting, and the output shaft forming an enclosed volume,
• a venting system for the constant velocity joint including a first generally longitudinal passageway formed within the output shaft extending from a distal end of the output shaft forming a first aperture and a second generally radial passageway formed within the output shaft joining and extending from the first passageway to a radially outer surface of the output shaft forming a second aperture, whereby the enclosed volume is vented to atmosphere by the first passageway and the second passageway, the second aperture positioned along the output shaft displaced from the sealing boot.