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TRIPLE SYNCHRONIZER MECHANISM OPERATION [Y16M-D]

BHE051101025T15

1. As the hub sleeve moves leftward (in the direction of the arrow), the synchronizer key presses against the end of the synchronizer ring. As the hub sleeve continues moving leftward, the synchronizer key presses onto the synchronizer ring. The synchronizer ring presses onto the middle ring, the middle ring presses onto the inner ring, and the inner ring presses onto the second gear.

1 | Synchronizer ring
2 | Middle ring
3 | 2nd gear
4 | Hub sleeve
5 | Ball
6 | Synchronizer key
7 | Inner ring

2. As the hub sleeve continues moving leftward, friction is produced along the friction surfaces of the synchronizer ring, middle ring, inner ring, and second gear, and the synchronizer ring rotates only an amount equivalent to the space in the key groove of the hub sleeve. As a result, the chamfers of the hub sleeve and the synchronizer ring become aligned. As the hub sleeve continues moving leftward, friction between each component becomes greater and the difference between the rotational speeds of the synchronizer ring, middle ring, inner ring, and second gear gradually disappears.

1 | Synchronizer ring
2 | Clutch hub key groove

3. As the hub sleeve continues moving leftward, the difference between the rotational speeds of the second gear and the hub sleeve disappears, and synchronization is completed. When synchronization is completed, the hub sleeve rides over the ball and engages the synchronizer ring.

1 | Synchronizer ring
2 | Hub sleeve

4. As the hub sleeve continues moving leftward, the hub sleeve then engages the synchro teeth to complete the shift.

1 | 2nd gear teeth