The rear cover seals the Torque Transfer Device (TTD) from the RDM on the LaCrosse and SRX. This cover seals to the pinion spline cylinder OD and the TTD housing bore ID, and must be installed squarely to prevent leaks. DT-50022 is designed to fit the seal and install it correctly in all areas, as well as clear the pinion spline cylinder height. DT-50022 is used with J-8092 Driver Handle. Unapproved methods will result in leaks.