Ford COUGAR 1968 Shop Manual page 191

PART 7-1
-
General Transmission Service
the converter area by washing with
suitable non-flammable solvent, and
3%2"
STEEL PLATE HEX. HEAD SCREW
blow dry with compressed air.
DISHED OR
( c )
Wash out the converter hous-
ing, the front of the flywheel, and
o.D
HEX. NUT %'-24
the converter drain plugs. The con-
verter housing may be washed out
using cleaning solvent and a squirt-
type oil can. Blow all washed areas
dry with compressed air.
( d )
Start and run the engine until
the transmission reaches its normal
operating temperature. Observe the
back of the block and top of the
converter housing for evidence of
fluid leakage. Raise the car on a
hoist and run the engine a t fast idle,
then a t engine idle, occasionally
shifting to the drive and reverse
LONG SQUARE
ranges to increase pressures within
CHAIN, 10' LONG THREAD END
the transmission. Observe the front
WELD TOGETHER REMOVE HEAD
SECURELY-MUST AND WELD TO
of the flywheel, back of the block
WASHER
(in as far as possible), and inside
the converter housing (Fig. 1). Run
STANDARD FITTING-
the engine until fluid leakage is evi-
VALVE
D1067-A
dent and the probable source of leak-
age can be determined.
FIG.
2-Converter
Leak
Checking
Tool
CONVERTER LEAKAGE
CHECK
During the above fluid leakage
checks, if there are indications that
the welds on the torque converter are
leaking, the converter will have to
be removed and the following check
made before the unit is replaced:
A leak checking tool (Fig. 2 ) ,
can be made from standard parts.
1. Install the plug in the con-
verter (Fig. 3) and expand it by
tightening the wing nut. Attach the
safety chains.
2. Install the air valve in one of the
drain plug holes.
3. Introduce air pressure into the
converter housing. Check the pres-
sure with a tire gauge and adjust
it to 2 0 psi.
4. Place the converter in a tank
of water. Observe the weld areas
for bubbles. If no bubbles are ob-
served, it may be assumed that the
welds are not leaking.
E N G I N E IDLE SPEED CHECK
Check and, i' f necessary, adjust
the engine idle speed, using the pro-
cedure given in Group 10.
If the idle speed is too low, the
ANTI-STALL DASHPOT
CLEARANCE CHECK
After the engine idle speed has
been properly adjusted, check the
anti-stall dashpot clearance. Follow
the procedure give in Group 10 for
checking and adjusting this clear-
ance.
M A N U A L LINKAGE CHECKS
Correct manual linkage adjust.
ment is necessary to position the
manual valve for proper fluid pres-
sure direction to the different trans-
mission components. Improperly
adjusted manual linkage may cause
cross-leakage and subsequent trans-
mission failure. Refer to Linkage
Adjustments for detailed manual
linkage adjustment procedures.
CONTROL PRESSURE A N D
V A C U U M D I A P H R A G M
U N I T CHECK
When the vacuum diaphragm unit
is operating properly and the down-
shift linkage is adjusted properly. all
the transmission shifts (automatic and
kickdown) should occur within the
road speed limits specified in the
Specification Section.
I f the automatic shifts do not oc-
cur within limits or the transmission
slips during shift points. the follow-
ing procedure is suggested to sepa-
rate engine. transmission, linkage,
and diaphragm unit or valve body
problems.
1. Using the automatic transmis-
sion tester (Fig. 4). attach the tacho-
meter to the engine and the vacuum
gauge to the transmission vacuum line
at the vacuum unit (Fig. 5).
2. Attach the pressure gauge to the
control pressure outlet a t the trans-
mission (Figs. 6 and 7).
3. Firmly apply the parking brake
and start the engine.
4. Adjust the engine idle speed to
the specified rpm. If the engine idle
speed cannot be brought within lim-
its by adjustment at the carburetor
idle adjustment screw, check the
throttle and downshift linkage for a
engine will run roughly. An idle
Tire Inflating Chuck
binding condition. If the linkage
is
speed that is too high will cause
Tire Pressure G a u g e
k
'
satisfactory, check for vacuum leaks
the vehicle to creep when the trans-
D1514-A
in the transmission diaphragm unit
mission is shifted into gear and w ~ l l
(Fig. 8), and its connecting tubes and
cause rough transmission engage-
FIG.
3-Typical Converter
Leak
hoses. Check all other vacuum oper-
ment. Checking Tool ated units for vacuum leaks.