Subaru 1600 Service Manual page 332

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
2) Inspection
Refer to the Control Valve ASSY
section.
3) Assembly
1) Install the control valve ASSY.
NOTE:
Be sure to tighten the bolts equally -
one at a time - using a torque wrench.
,
Tightening
torque
6 -8 N·m
(0.6 - 0.8 kg·m,
4.3 - 5.8 ft-Ib)
2) Connect the servo pipes.
NOTE:
Always install new servo pipes.
A13-451
Fig. 7-55 Installing the servo pipe
3) Align the mating surfaces of the
converter oil pan and converter to en·
sure no clearance exists at any point.
The gasket should not be used at this
point.
4) Wipe any oil from the mating sur-
faces and install the converter oil pan
with the gasket in place.
NOTE:
Always use a new gasket.
Tightening
3.4 - 4.4 N·m
(0.35 - 0.45 kg-m,
torque
2.5 - 3.3 ft-Ib)
Drain plug
25N·m
tightening
(2.5 kg-m, 18 ft-Ib)
torque
5) Using the Diaphragm Rod Gauge
Set, check the length of the diaphragm
rod is within specifications and, if the
length is correct, install the vacuum
diaphragm.
For selection of a suitable diaphragm
rod, refer to "5. TRANSMISSION
CASE SECTION".
6) Install the downshift solenoid and
connect the vacuum hose.
NOTE:
Do not forget to install the "0" ring.
7) Replenish ATF and check the oil
level. The amount of ATF to be
replenished is approximately 4 liters
(4.2 US qt, 3.5 Imp qt).
2. Various Test Methods
1) Stall Tests and Interpreta-
tion of Test Results
The stall test is of extreme importance
in diagnosing the condition of the
automatic transmission and the engine.
It should be conducted to measure the
engine stall speeds in all shift ranges
except the P and N ranges.
1) Purposes of the stall test
1) To check the operation of the
automatic transmission clutch and
brake band.
2) To check the operation of the
torque converter.
3) To check engine performance.
2) Test methods
Prior to the stall tests, check to ensure
the carburetor throttle valve opens
fully, and that the levels of engine oil,
cooling water and ATF are correct.
Set the select lever in the P range and
idle the engine at 1,200 rpm for several
minutes until the ATF reaches approxi-
mately 60°C (l40°F).
1) Install an engine tachometer at a
location visible from the driver's com-
partment and mark the stall speed
range of 2,100 to 2,300 on the tacho-
meter scale.
I
Stall speed
I
2,100 - 2,300 rpm
I
2) Place the wheel chocks at the
front and rear of all wheels and en-
gage the parking brake.
3) Move the manual linkage to en-
sure it operates properly, and shift the
select lever to the D range.
7-37
4) While forcibly depressing the foot
brake pedal, gradually depress the
accelerator pedal until the engine oper-
ates at full throttle.
5) When the engine speed is stabi-
lized, read that speed quickly and
release the accelerator pedal.
6) Shift the select lever to Neutral,
and cool down the engine by idling it
for more than one minute.
7) Record the stall speed.
8) Perform the stall tests with the
select lever in the 2, 1 and R ranges.
NOTE:
a. Do not continue the stall test for
MORE THAN FIVE SECONDS at
a time (from closed throttle, fully
open throttle to stall speed read·
ing). Failure to follow this instruc-
tion causes the engine oil and ATF
to deteriorate and the clutch and
brake band to be adversely affect-
ed.
Be sure to cool down the engine
for a, least one minute after each
stall test with the select lever set
in the P or N range and with the
idle speed lower than 1,200 rpm.
b. If the stall speed is higher than the
specified range, attempt to finish
the stall test in as short a time as
possible, in order to prevent the
automatic transmission from sus-
taining damage.