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21 -66
TRANSMISSION-TORQUEFLITE
I L L E R
rUBE
,
Fig.
37-Pressure
Test Locations fRight Side of Case)
(3) Disconnect top end of accelerator pedal rod [6].
Adjust the length of this rod to provide a pedal angle
of 111" to 113". To increase pedal angle, increase the
length of this rod by means of the screw adjustment.
Reinstall the top end of the rod [6]. Connect choke [4]
rod or remove blocking fixture.
HYDRAULIC CONTROL PRESSURE TESTS
Line Pressure und Front Servo
Releuse Pressure
Line pressure and front servo release pressure
tests must be made in D (drive) position with the rear
wheels free to turn. The transmission fluid must be at
operating temperature (150 to 200" F).
(1) Install an engine tachometer, raise the vehicle
on a hoist and position the tachometer so
it
can be
read under the vehicle.
1
URN FITTING)
" p "
ON
R E
(
GOVERNOR
PRESSURE
b
Fig. 38-Pressure
Test Locations fRear End of Case)
(2) Connect two 0-100 psi pressure gauges, Tool
C-3292 to the pressure take-off-points at the side
of
the accumulator and at the front servo release (Fig.
37).
(3) With the control in D (drive) position, speed up
the engine slightly until the transmission shifts into
direct. (Front servo release will be pressurized in di-
rect.) Reduce the engine speed slowly to 1,000 rpm.
Line pressure at this time (1,000 rpm) must be 54-60
psi, and the front servo release pressure must not be
more than 3 psi below the line pressure.
(4)
Disconnect the throttle linkage from the trans-
mission throttle lever and move the throttle lever
gradually to the full throttle position. Line pressure
must rise to a maximum of 90-96 psi just before
or
at
kickdown into low gear. Front servo release pressure
must follow the line pressure up to the kickdown
point and should not be more than 3 psi below the
line pressure.
If the pressure is not 54-60 psi at 1,000 rpm, adjust
the pressure, as outlined on Page 67.
If the front servo release pressures are less than
the pressures specified and line pressures are within
limits, there is excessive leakage in the front clutch
and/or front servo circuits.
Always inspect the exter-
nal transmission throttle lever for looseness
on
the
valve body shaft when making the pressure tests.
Lubrication Pressures
The lubrication pressure test should be made at
the same time that line pressure and front servo re-
lease pressure are tested.
(1) Install a "tee" fitting between the cooler return
line fitting and the fitting hole in the transmission
case at the rear of left side of the transmission (Fig.
38). Connect a 0-100 psi pressure gauge, Tool C-3292
to the "tee" fitting.
(2) At 1,000 engine rpm, with the throttle closed
and transmission in direct, lubrication pressure
should be 5-15 psi. Lubrication pressure will be ap-
proximately doubled as the throttle is opened to max-
imum line pressure.
Reur Servo Apply Pressure
(1) Connect a 0-300 psi pressure gauge, Tool
C-
3293 to the apply pressure take-off point at the rear
servo (Fig. 38).
(2) With the transmission control in R (reverse) po-
sition and the engine speed set at 1600 rpm, the re-
verse servo apply pressure should be 240-280 psi.
Governor Pressure
(1) Connect a 0-100 psi pressure gauge, Tool
C-
3292 to the governor pressure take-off point, located
at the lower left side of the extension near the mount-
ing flange (Fig. 38).
(2) Governor pressures should fall within the limits
given in the "Governor Pressure Chart."
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