Buick LeSabre 1965 Service Manual page 280

5 - 6 6 SERVICE PROCEDURES SUPER TURBINE " 3 0 0 '
Figure 5-360
c. Install dial indicator set at 0
as shown in Figure 5-365.
d. Loosen hex nut. When nut is
fully loosened the reading ob-
tained on the dial indicator will
be converter end clearance. If
clearance is .050" or over and the
oil has the appearance of having
been mixed with aluminum paint,
replace the converter. See Figure
5-360.
Figure 5-361
3. Install converter. See Figure
5-361.
5-32 TROUBLE DIAGNOSIS
GUIDE
a. Oil Check
Before diagnosis of any trans-
mission complaint is attempted,
the oil level should be checked.
At the same time, it should be
observed on the dipstick whether
the oil is solid in texture or
aerated. Aerated oil gives an in-
dication of an oil leak in the
suction line, which can cause
erratic operation and slippage.
Water in the oil imparts a milky,
pink cast to the oil and can cause
spewing.
b. No Drive In Any
Selector Position
1. Check oil level.
2. Check oil pressure as de-
scribed in paragraph 5-33.
3. Check manual shift linkage ad-
justment. See Section 4A.
4. Check internal linkage. See
Figure 5-282.
5. Check for defective pressure
regulator valve.
6. Check for pressure regulator
valve retaining ring out of groove.
7. Check for defective front
pump.
c. Erratic Operation and
Slippage (Light to
Medium Acceleration)
1. Check filter or screen and
suction pipe assembly for leaks.
2. Check suction pipe "O" ring.
3. Low oil level.
4. Check for defective modulator.
See Figure 5-362.
d. Excessive Slip or Engine
Flare on Coasting to A
Stop or When Cornering
1. Check engine idle. See para-
graph 3-8.
2. Check for suction leak as de-
scribed in items 1 and 3.
3. Check low band adjustment.
See paragraph 5-26.
4. Check for proper modulator
can assembly. See chart on page
5-1.
5. In s e v e r e customer com-
plaints, proceed as follows:
a. Remove transmission from
car.
b. Check pump cover and stator
shaft for cross leakage. See Fig-
ure 5-363.
c. Remove coast downshift timing
valve. See Figure 5-205.
e. Transmission Sluggish
From A Standing Start
1. Check idle stator switch. See
Figure 5-38.
2. Check stator valve body in-
cluding valve and solenoid. See
Figure 5-371.
f. No Reverse
1. Check reverse clutch piston
seals.
2. Check freedom of reverse
clutch piston.
3. Check for open feed lines to
reverse clutch. See Figures
5-364 thru 5-372.
4. Loose stator valve body at-
taching bolts. Specification is
8-12 ft. lbs.
g. Slips (In Any Range)
1. Refer to items 3 and 20.
h. Harsh Neutral To Drive
Shift At Idle
1. Check vacuum l i n e
connections.
2. Check engine idle speed. See
paragraph 3-8.
3. Check for three (3) springs in
the low servo assembly or im-
proper assembly of washers. See
Figure 5-179.