The
Syncro-Mesh Transmissions used on the passenger car, commercial 1/2-ton, 3/4-ton
and 3/4-ton special
trucks are essentially the same with the exception that on the passenger
car the shifting mechanism is
mounted on the side of the transmission while on the 1/2-ton
and 3/4-ton trucks the cover and shifting mechanism is mounted on
top of the transmission. Carburized gears, and roller bearing type countergear, are used in the
1/2, 3/4, and
3/4-ton special truck 3-specd transmissions. All gears and splines are helical cut as shown
in Fig. 1, and all surfaces of
the passenger car transmission shifter yokes contain a "wear resisting
coating" to prevent scoring of any surface during the break-in
period and to provide greater resistance to wear.
NOTE—When installing a
four-speed transmission in a
half-ton truck, it is necessary to replace the brake main cylinder bracket with
one designed for use with the
four-speed transmission.
In addition
to the above, it will also be necessary to install a speedometer gear adapter,
and a different set of speedometer gears on 1/2, 3/4 and
3/4-ton special trucks. For the
correct set of speedometer
gears to use, refer to the speedometer gear and adapter specifications given in
the Rear Axle Section of this
Shop Manual.
TRANSMISSION SPECIFICATIONS
Gear
Ratios:
First
gear .......,........... 2.94 to 1
Second
gear................ 1.68 to 1
Third gear
................. 1 to 1
Reverse
gear ............... 2.94 to 1
Grease
capacity...................1-1/2 pints
The same special tools used for
overhauling the 1937 through 1941
transmissions can be used on the 1942 passenger, commercial and
truck transmissions.
REMOVAL OF TRANSMISSION FROM
CHASSIS (Passenger Cars Except Cabriolet)
1. Remove
the floor mat and the cover over the transmission from the body
floor.
