Operation Of Internal Shift Mechanism

The internal shift mechanism includes all components within the transaxle housing which are involved in the actual shift operation or ensure a splined connection of the idler gears with the respective output shaft.

This includes:

• The gear actuator cylinders
• The shift forks
• The synchronization devices

In order to engage a gear, pressure is built up or released in the respective gear actuator cylinder so that the sliding sleeve of the synchronization device is moved by the shift fork. The shift fork is guided onto the shift rod and engages in the sliding sleeve. It moves the sliding sleeve in an axial direction and thus balances the RPM between the idler gear and output shaft so that the gear is engaged. Permanent magnets are attached to the shift forks via U-shaped brackets. The brackets transfer the axial movements of the shift forks during shift operations. Based on the position of the permanent magnets, the TCM can indirectly determine the position of the corresponding shift fork.