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CLUTCH, TRANSMISSION, UNIVERSAL JOINT
TRANSMISSION
4-15
SECTION 4-C
SYNCRO-MESH TRANSMISSION AND UNIVERSAL JOINT
CONTENTS OF SECTION 4-C
Paragraph
Subject
Page
4-17
Transmission
Ty
pes and M
ount in g 4-15
4-18
Series
40-50 Transm ission-
Description
4-
15
4-19
1948
Series
70
Transmission -
D
escr ip t ion
.
. .
.
.
.
. .
. .
.
.
.
. .
. .
4-17
4-20
U
niversal
Joint a
nd Torque
Ball
.
.
..
4-2
0
4-21
Transmission
Shift
Mechanism
. .
4-20
4-22
Service
R
ecom m end a t ions
. . .
4-25
4-23
Trouble
Dia gn osis
4-25
4-24
Speedometer
Gears and Cable
4-26
4-25
Adjustment
of
Transmission
Shift
Contro ls
.
.
. . . .
. . .
.
.
. .
4-2
7
4-26
Replacement
of Shift Control Parts
.
4-27
4-27
Special
Tools and Fixtures
.
. . .
. .
.
.. 4-28
Paragraph
Subje ct
Page
4-28
Ad
justment
of Torque Ball and
Packing
. .
.
. .
.
.
. . . . . . . .
.
. .
.
.
..
4-30
4-2
9
Removal of Transmission-All
Series
.
.
. . . .
.
.
. .
.
. . . .
.
.
.
.
.
. . ..
4-33
4-3
0
Disassembly of Transmission-
Series
40-
50
.
.
.
.
.
.
. .
.
.
.
.
. .
.
. .
..
4-33
4-31
Disassembly
of Transmission-
1948
Series
70
. .
. . .
.
. . .
.
. .
.
4-3
5
4-32
Cleaning and
Inspection
of Trans-
mission Parts
. .
. .
. . .
.
. . . . . .
.
4-36
4-33
Assembly of Transmission-All
Series
. . . .
. .
.
.
.
. . . .
.
.
.
. .
4-38
4-34
Installation of
Transmission-All
Series. .
.
.
.
.
.
.
.
. .
.
4-40
SERVICE BULLETIN
REFERENCE
Bulle tin
No
.
Page No
.
SUBJECT
4-17 TRANSMISSION TYPES AND
MOUNTING
In 1948
Models,
Syncro-Mesh
t
ransmission s
are used as
standard
eq
uip me nt,
with Dy
na-
flow Drive
available
as
optional equipmen t on
Series 70 only. In 1949 Mode
ls,
Sy
ncro-Mesh
transmissions
are used as
stand ard
eq
uipment
in
Series
40-50,
with
Dynaflow Drive
available
as optional eq
uipment
on Series 50. Dynaflow
Drive is standard eq
uipment
in 1949 Series 70,
and Syncro-Mesh is not available in this
series.
The
Syncro-Mesh transmission
used in 1948
Series 70 is
larger
a
nd
of a differ en t design t
han
the
transmission
used
in Series 40-50 . In
both
transmissions, gears are
synchronized when
shifting into second and third speeds only.
In all
series
the
Syncro-Mesh transmission
is
solidly bolted
to t
he
rear face
of
flywh eel
upper
housing, with a
heavy pa per gask et
between, to
form a unit
assembly
with
t
he engine . The
transmission main drive gear extends through
the
clutch
driven plate into a
single-row-ball
pi
lot
bearing seated in the rear end of engine
crankshaft.
The outer race of main drive gear
bearing projects from transmission case to seat
in a counterbore in
flywheel
housing, thus serv-
ing as a pilot to center the transmission with
engine crankshaft.
The transmission, as well as rear end of en-
gine, is carried on a channel-shaped support or
.
cross member which is bolted to the frame "X"
member. The transmission is cushioned on a
rubber mounting pad which is bolted to the
rear bearing retainer and to the top of "t r ans-
mission support. Driving thrust is taken
by
a
rubber thru
st
pad located between the rear
flange of transmission support and a thrust
plate attach
ed
to rear bearing retainer
by
the
torque ball r
etainer
bolts. Shims, as required,
are
placed between
the transmission support
and the thrust pad to fill
a
ny
f
or e and aft space
existing
at this point wh
en
engine and trans-
mission
mounting
pads are in normal
position.
See figure
4-60.
4-18 SERIES 40-50 TRANSMISSION-
DESCRIPTIO N
The tran
smission
main drive gear is sup-
ported
by a ball bearing
seated
in
front
wall of
transmission case. The ball bearing, which is
shielded on r
earward
side, is pressed against a
shoulder on main drive gear and held in place
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