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21 -2
TRANSMISSION-MANUAL
DIAGNOSIS
The main drive pinion is supported by a heavy duty
ball bearing at the rear, and an Oilite bushing pressed
into the end of the crankshaft. The main shaft front
end is piloted in 16 needle type roller bearings, lo-
cated in a cavity in the end of the main drive pin-
ion and is supported by a heavy duty ball bearing in
the center of the case. The rear end of the mainshaft
is supported by a ball bearing pressed on the end of
the mainshaft and a snug fit in the end of the ex-
tension housing.
The countershaft gear (cluster) is supported by a
double row of needle type roller bearings (38) at each
end and the thrust is taken on thrustwashers between
the ends of the gear and the transmission case. The
alignment of the needle type roller bearing within the
gear are maintained by
4
thrust washers (one being
used between the rows of roller bearings and one at
each end).
The reverse idler gear is supported on a bronze
bushing, pressed into the gear.
The gearshifting is manually operated through shift
control rods to the transmission. Any forward gear
may be engaged while the vehicle is in motion through
the use of synchronizing clutches.
The transmission may be used as an aid to deceler-
ation by downshifting in sequence without double
clutching or gear clashing, due to the fact that all
forward speeds are synchronized.
(The reverse
speed-
gear is not synchronized.)
The service procedures
covering the four forward speed transmission used on
all vehicles so equipped is identical to the following
service procedures except where noted.
Fig. 2-A-745
Three Speed Transmission
fSectional V i e w )
6 1 X
I60
A
64x735
\
-
Fig.
3-A-833
Four
Speed Transmission
lSectional V i e w )
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