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TRANSMISSION· DIFFERENTIAL
105
J
5
4
!j/
.
,
(f
I
\\
~,
.
,
,
'~~------------~~/
-:--- .----=
1
1
x
Fig. 168.
First speed gear and synchronizer as-
sembly.
1. Gear. - 2. Synchromesh ring.• 3. Thrust
plate. - 4. SlOp plate.• 5. Synchronizer
spreader spring.• 6. Snap ring. - 7. Gear
toothed crown.
X =
2.6071"
±
.0079" (66.22
±
0.2
mm):
overall diameter of new synchromesh ring.
When sleeve and gear teeth are
in full
mesh, the
synchro
ring
settles down inside the slip sleeve.
which makes for the solid engagement of the gear
attached.
Engagement of 1st Gear.
With
a view to relieving to a great extent the
driver of the effort involved
with
the engagement
of the 1st gear. on starting a car at standstill, a
synchromesh device has been provided which has
one spreader spring (5, fig. 168) operating solely
in the downshift from second to first gear.
Moreover, the thrust plate (3, fig. 168) of the
1st gear synchronizer has an end lug jutting in
into a slit in the gear.
An
end of the synchromesh ring (2) abuts against
the thrust plate, while the plate lug sets in touch
with the gear hub in the slit; thus the thrust plate
is raised to increase the end thrust applied by the
synchromesh ring.
When the car is started, the engine turns at low
speed and therefore it will be just sufficient to
control inertia of the driven plate.
For the downshift from second to first, the syn-
chromesh of gears is made the same way as for
the downshift from fourth to third.
Fig. 169 • Using tool A. 10100/2 to inslall the synchronizer snap
ring.
1. Snap ring. - 2. Synchromesh ring.• 3. Third speed gear. -
4. Spreader spring.
FIg. 170 • Transmission side cover assembly.
1. Cover. - 2. Gear selector lever. - 3. Lever screw.• 4. Reverse
shifter fork. ·5. first and second shifter fork.• 6. Screw for fork 5.•
7. First and second shifter rail dog screw. - 8. Third and fourth
shifter fork.• 9. Screw for fork 8.
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