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(083)
PART 7-1- GENERAL TRANSMISSION SERVICE
7-3
SECTION
VIEW FROM
A-A
FRONT
(REVOLVED)
D
1360-A
FIG. 2-
Transmission
Vent at Front of Transmission Case
should be made before the unit is
replaced. A leak checking tool (Fig.
3) can be made from standard parts.
1. Install the plug in the converter
(Fig. 4) and expand it by tightening
the wing nut. Attach the safety
chains.
2. Install the air valve in one of
the drain plug threads.
3. Introduce air pressure into the
converter housing. Check the pres-
sure with a tire gauge and adjust it
to 20 psi.
4. Place the converter in a tank of
water. Observe the weld areas for
bubbles. If no bubbles are observed,
it may be assumed that the welds are
not leaking.
ENGINE IDLE SPEED CHECK
Check and, if necessary, adjust the
engine idle speed, using the proce-
dure given in Group 10.
If the idle speed is too low, the
engine will run roughly. An idle
speed that is too high will cause
the car to creep, have harsh engage-
ments and harsh closed
throttle
downshifts.
MANUAL LINKAGE CHECKS
Correct manual linkage adjustment
is necessary to position the manual
valve for proper fluid pressure direc-
tion to the different transmission
components.
Improperly
adjusted
manual linkage may c:ause cross-
leakage and subsequent transmission
failure. Refer to Linkage Adjust-
ments in this Group of the manual
for detailed manual linkage adjust-
ment procedure.
CONTROL PRESSURE, VACUUM
DIAPHRAGM UNIT, AND
DOWNSHIFT LINKAGE
When the vacuum diaphragm unit
is operating properly and the down-
shift linkage is adjusted properly, all
the transmission shifts (automatic
DISHED OR
FLAT WASHER
1
JA"
O.D.,
1
~"
I.D.
¥32"
STEEL PLATE
o/a"
X 1%",
DRILL TO SUIT
~ HEX. HEAD SCREW
!!!!!"
3
/8"
-24 X
V2
HEX. NUT %"-24
WELD
TOGETHER
RUBBER PLUG
1
V2"
DIA. X 2"
LONG
V2"
SPACER-
HOLE THRU
B2Q-9438-A
APPROXIMATElY
40 DUROMETER
PLUG
STANDARD BOLT
V2"- 13 X 4 V2"
LONG SQUARE
CHAIN, 1 0" lONG
VALVE
FIG.
3-Converter Leak Checking Tool
and kickdown) should occur within
the road speed limits given in the
Specification Section of Group 7.
Automatic Shifts (Control Pres-
sure and Diaphragm Unit Checks).
If
the automatic shifts do not occur
within limits, the following procedure
is suggested to separate engine, trans-
mission, linkage, and diaphragm unit
troubles:
1. Attach a tachometer to the
engine and a vacuum gauge to the
transmission vacuum line, at the
transmission.
2. Attach a pressure gauge to the
control pressure outlet at the left
side of the transmission.
3. Firmly apply the parking brake
and start the engine.
4. Adjust the engine idle speed to
the specified rpm in Dl or D2.
If
the engine idle speed cannot be
brought within limits by adjustment
at the carburetor idle adjustment
screw, check the throttle and down-
shift linkage for a binding condition.
If
the linkage is satisfactory, check
for vacuum leaks in the transmission
diaphragm unit and its connecting
tubes and hoses. Check all other
vacuum operated units (such as the
power brake or distributor advance
diaphragm) for vacuum leaks.
5. At engine idle speed, read the
engine vacuum gauge and the trans-
mission control pressure gauge.
The engine vacuum gauge should
read a minimum of 18.0 inches.
If
WElD TOGETHER
SECURElY -MUST
NOT LEAK
STANDARD FITIING-
87971-S
THREAD END
REMOVE HEAD
AND WELD TO
WASHER
01067-A
the vacuum gauge reading is lower
than 18.0 inches, an engine or
vacuum line problem is indicated.
Repair as necessary.
The transmission control pressure
should agree with the control pres-
sures as outlined in the Specification
Section of Group 7. If transmission
control pressure is within limits, shift
the transmission into
D
1 or D2 and
firmly apply the service brakes. Ad-
vance the throttle until the engine
vacuum gauge reading falls below
16-13.7 inches. As the vacuum gauge
reading passes through the 16-13.7
inches range, transmission control
pressure should start to rise and con-
\
~ ~Tire
Pressure
Gauge
-. :>
FIG.
4-Converter Leak
Checking Tool Installation
01068-A
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