Triple Synchronizer Mechanism Operation - Mazda RX-8 2004 Service Highlights

TRIPLE SYNCHRONIZER MECHANISM OPERATION

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.
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.
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.
4. As the hub sleeve continues moving leftward, the
hub sleeve then engages the synchro teeth to
complete the shift.
End Of Sie
MANUAL TRANSMISSION [Y16M-D]
SYNCHRONIZER RING
MIDDLE RING
2ND GEAR
INNER RING
SYNCHRONIZER RING
CLUTCH HUB KEY
GROOVE
SYNCHRONIZER RING
HUB SLEEVE
2ND GEAR TEETH
CHU051101025S06
HUB SLEEVE
BALL
SYNCHRONIZER KEY
CHU0511S105
CHU0511S106
CHU0511S107
CHU0511S108
05–11–5
05–11