Abstract: A transmission, in particular a dual clutch transmission, has a plurality of transmission shafts and a fastening apparatus for at least one fixed gear on one of the transmission shafts. The fixed gear is held axially on the transmission shaft by way of a fastening nut. The fixed gear is formed with a recess around the transmission shaft in a region that lies radially below the gear toothing system. A fastening sleeve is positioned in the recess between the fixed gear and the transmission shaft in a section which adjoins a fastening nut. During the clamping of the fastening nut, the latter bears against the fastening sleeve. As a result, the transmission of micromovements to the fastening nut is minimized or prevented, with the result that loosening of the fastening nut does not take place during the operation of the transmission.

Abstract: A hydraulic system for a clutch has a pump conveying a hydraulic fluid stream via a heat exchanger to a controllable hydraulic valve which divides the hydraulic fluid stream into a first part stream and a second part stream. The first part stream flows to a reservoir via friction linings of the clutch and the second part stream flows to the reservoir via a hydraulic path bypassing the friction linings. The hydraulic system is set up for upgrading a cooling of the clutch by increasing the first part stream at the expense of the second part stream and for reducing the cooling of the clutch by increasing the second part stream. The system is set up for temporarily upgrading the cooling of the clutch in the event of a changeover of torque transfer from transfer via a first part transmission to transfer via a second part transmission of the transmission.

Abstract: A transmission, in particular a dual clutch transmission, has a plurality of transmission shafts and a fastening apparatus for at least one fixed gear on one of the transmission shafts. The fixed gear is held axially on the transmission shaft by way of a fastening nut. The fixed gear is formed with a recess around the transmission shaft in a region that lies radially below the gear toothing system. A fastening sleeve is positioned in the recess between the fixed gear and the transmission shaft in a section which adjoins a fastening nut. During the clamping of the fastening nut, the latter bears against the fastening sleeve. As a result, the transmission of micromovements to the fastening nut is minimized or prevented, with the result that loosening of the fastening nut does not take place during the operation of the transmission.