Advertisement
(165)
.
CLUTCH, TRANSMISSION, UNIVERSAL JOINT
TRANSMISSION
4-37
facturing cutter marks with scores or pits.
Conical surfaces of gears where contacted by
synchronizing drums must be smooth and free
of burrs. Slight scores or burrs may be honed
off with a fine stone, however, if any gear is
chipped or excessively worn it should be re-
placed.
Inspect all shafts for wear or roughness on
bearing surfaces. Check fit of gears on shafts
upon which they are mounted. The sliding
sleeve (Series 40-50) and synchronizing clutch
(Series 70) must slide freely on splined section
of main shaft, but without appreciable back-
lash.
d. Synchronizing Drums
The cam surfaces of synchronizing drums
(Series 40-50) must be smooth. The conical
surfaces of synchronizing drums, in all series,
must be free of burrs or scores, and oil grooves
must be clean.
Never polish this surface or
change the
angle.
e. Selector Shaft, Shifter Yokes and Shafts,
Toggle Spring Extension
Check selector shaft and shifter yoke shafts
on a flat surface to see whether they are bent.
A bent shaft will cause hard shifting, and
should be
replaced.
If a shifter yoke is bent or
has rough contact surfaces it will cause hard
shifting and noise, therefore, it should be re-
placed. Replace poppet springs if distorted or
of doubtful strength.
Check toggle spring extension to make sure
it is not distorted. An improperly shaped ex-
tension will bear against the selector shaft and
actually tend to pull transmission out of second
speed. Figure 4-52 shows the correct shape for
ACTUAL SIZE
Figure 4-52-Toggle Spring Extension
extension
on all series. A bent extension should
be reshaped to dimension
shown,
or
replaced.
f. Universal Joint and Torque Ball
Inspect universal joint for wear in bearings
and for fit on main shaft and propeller shaft,
and in torque ball bushing. Allowable play of
spider pins in bushings is .002" to .004". Al-
lowable backlash of rear yoke on propeller
shaft splines is .0005" to .0045". The front
yoke must be a tight fit, rotatively, on main
shaft to prevent "snap" when alternating car
movement between forward and r
everse.
The
rear yoke of universal joint and bushing in
torque ball must be free of scores and not worn
excessively; clearance between these parts
should be .004" to
.006".
If torque ball and retainers are scored or pit-
ted on bearing surfaces they should be
replaced.
If oil seal in torque ball is worn, remove
old
seal
but do not install a new one at this time.
Dis-
card outer retainer packing (1948) or
torque
ball boot (1949) if worn or
damaged.
M
AN DREL
J
224
0
Figure 4-53-Checking Run-Out of Transmission
Case-
Series 40-50
g. Transmission Case
Inspect
selector shaft oil
seal in
case.
If
worn,
or there was
evidenc e of oil leakage past
the
seal,
remove it and install a new one. Coat
outer surface of seal with white lead or other
sealing compound and install seal with feather
edge pointing inward.
If the transmission had been jumping out of
third speed, the alignment of flywheel housing
with engine crankshaft should be checked as
described in paragraph 2-33, and front face of
Advertisement
