07-01-04
General Transmission Service
07-01-04
taching bolts to the proper torque. If
necessary, replace the gasket.
Check the fluid filler tube connec-
tion at the transmission case or pan.
If leakage is found here, install a new
O-ring or tighten the fitting to the
specified torque.
Check the fluid lines and fittings
between the transmission and the
cooler in the radiator tank for loose-
ness,
wear, or damage. If leakage can-
not be stopped by tightening a fitting,
replace the damaged parts.
Check the engine coolant in the ra-
diator. If transmission fluid is present
in the coolant, the cooler in the radia-
tor is probably leaking.
The cooler can be further checked
for leaks by disconnecting the lines
from the cooler fittings and applying
50-75 psi air pressure to the fittings.
Remove the radiator cap to relieve the
pressure build at the exterior of the oil
cooler tank. If the cooler is leaking
and will not hold this pressure the
cooler must be replaced. Cooler re-
placement is described in the Cooling
System Section of Group 11.
If leakage is found at either the
downshift control lever shaft or the
manual lever shaft, replace either or
both seals.
Inspect the pipe plug on the left
side of the transmission case at the
front. If the plug shows leakage, tor-
que the plug to specifications. If tight-
ening does not stop the leaks, replace
the plug. On a C6 transmission, a TV
pressure plug is also provided on the
right rear side of the case.
When converter drain plugs leak,
remove drain plugs with a six-point
wrench. Coat the threads with FoMo-
Co Perfect Seal Sealing Compound or
its equivalent, and install the plugs.
Torque the drain plugs to specifica-
tion. Fluid leakage from the converter
housing may be caused by engine oil
leaking past the rear main bearing or
from oil gallery plugs, or power steer-
ing oil leakage from steering system.
Be sure to determine the exact cause
of the leak before repair procedures
are started.
Oil-soluble aniline or fluorescent dyes
premixed at the rate of 1/2 teaspoon
of dye powder to 1/2 pint of transmis-
sion fluid have proved helpful in locat-
ing the source of the fluid leakage.
Such dyes may be used to determine
whether an engine oil or transmission
fluid leak is present or if the fluid in
the oil cooler leaks into the engine
coolant system. A black light, how-
ever, must be used with the fluorescent
dye solution.
DISHED OR
FLAT WASHER
" O.D.,
a" STEEL PLATE
5/8"X \W,
DRILL TO SUIT
HEX. HEAD SCREW
3/8"-24 X Vl
HEX. NUT W—
24
WELD
TOGETHER
WING
NUT
>/2"_13
THREAD
CHAIN,
10"
LONG
RUBBER PLUG
1
Vi" DIA. X 2"
LONG Vl"
HOLE THRU
APPROXIMATELY
40 DUROMETER
FLAT WASHER
Vs" O.D.
PLUG
VALVE
STANDARD BOLT
W-13
X 4Vl"
LONG SQUARE
THREAD
END
REMOVE HEAD
AND WELD
TO
WASHER
STANDARD 1/8" FITTING-87971-S FOR
RETAPPED DRAIN PLUG THREADS-USE
1/4" OVERSIZE FITTING-87973-S
D 1067-B
WELD TOGETHER
SECURELY—MUST
NOT LEAK
FIG. 2—Converter Leak Checking Tool
CONVERTER LEAKAGE
CHECK
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. The tool
can be used to check all converters.
1.
Install the plug in the converter
(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. Check the pressure 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 procedure
given in Group 10.
If the idle speed is too low, the en-
gine will run roughly. An idle speed
that is too high will cause the vehicle
to creep, have harsh engagements and
harsh closed-throttle downshifts.
ANTI-STALL DASHPOT
CLEARANCE CHECK
After the engine idle speed has been
properly adjusted, check the anti-stall
dashpot clearance. Follow the proce-
dure given in Group 10 for checking
and adjusting this clearance.
MANUAL LINKAGE CHECKS
Correct manual linkage adjustment
is necessary to position the manual
valve for proper fluid pressure direc-
tion to the different transmission com-
ponents. Improperly adjusted manual
Tire Pressure Gauge
D1921-A
FIG. 3—Converter Leak Checking
Tool Installationprocarmanuals.com
