Buick LeSabre 1965 Service Manual page 198

4 - 6 2 46000 4-SPEED TRANSMISSION
CLUTCH, S-M TRANSMISSION
4 - 3 6 4 6 0 0 0 SERIES 4-SPEED SYNCHROMESH TRANSMISSION TROUBLE DIAGNOSIS
SYMPTOM AND PROBABLE CAUSE
SHIFTS HARD
a. Clutch not releasing engine or slow to
release.
b. Shift linkage binding or selector not prop-
erly adjusted.
SHIFTS HARD ON DOWNSHIFT
a. Downshifting at too high an engine speed.
DISENGAGES FROM GEAR
a. Dirt between transmission case and clutch
housing.
b. Does not fully engage.
c. Clutching teeth worn or defective and/or
clutch hub spline worn.
NOISY
a. Gears worn, scored or broken.
b. Bearing dirty, worn.
c. Interference of c l u t c h s l e e v e with
countergear.
LEAKS LUBRICANT
a. E x c e s s i v e amount of l u b r i c a n t in
transmission.
b. Loose or broken clutch gear b e a r i n g
retainer.
c. Clutch gear b e a r i n g r e t a i n e r gasket
damaged.
PROBABLE REMEDY
a. Adjust or repair clutch.
b. Free up and adjust as required.
a. Shifting into low gear above 45 MPH and
second above 65 MPH causes extra work
for synchronizers and will require extra
time or more force on lever to complete.
There is also danger of over-speeding the
engine if low or second is used at high car
speeds.
a. Clean mating surfaces.
b. Check linkage for interference. Adjust or
replace damaged shift linkage.
c. Replace gear, clutch sleeve and clutch hub.
a. Replace gears.
b. Flush transmission with kerosene. If noise
is still present, replace bearings and ex-
amine gears as above.
c. Replace worn shift forks, countergear, and
idler gear thrust washers to restore gears
and clutch sleeve to proper location. Ex-
amine thrust faces on these gears for wear.
Replace if worn excessively.
a. Drain to correct level.
b. Tighten or replace retainer.
c. Replace gasket.