Subaru 1600 Service Manual page 310

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
3. Precautions for 4WD
automatic transmission
1) Be sure to use recommended
au tomatic transmission fluid (A TF).
The use of any other fluid may cause
chattering of the transfer clutch.
2) If the driving mode is changed
from 4WD to FWD while making a
turn, a light shock may be felt in the
vehicle body. This shock is caused by
the releasing of the tight corner
braking feature, and is a normal
phenomenon.
A similar shock may also be felt when
changing from 4WD to FWD after a
sudden stop.
3) If the pilot lamp remains off even
after operating the 4WD selector
switch, the 4WD operating electrical
circuit may be faulty; the circuit must
be checked and repaired.
2 LOCK UP TORQUE
CONVERTER
1. Construction
An installation drawing in which the
centrifugal lock up clutch is built into
the torque converter and a view of the
shoe section as seen from the front of
the engine are shown below.
This lock up clutch transmits torque
by the centrifugal force acting on the
shoes that slide along the inner circum-
ference of the turbine cover. It has a
very simple construction, consisting of
five components: shoes and weights
with paper facings pasted on their
outer surfaces, two leaf springs (main
and retractor springs) and pins. Eight
shoes are used.
4) If the front wheels must be en-
gaged with the front end of the vehicle
jacked up, or on a roller, be sure to set
the 4WD selector switch to the FWD
position, or disconnect the transfer
solenoid harness connector in the
engine compartment.
Remember, if the switch is kept in
the 4WD position, the vehicle may be
moved as the engine is started.
When disconnecting the harness in the
engine compartment, use extreme care
not to confuse the connectors.
5) The use of different sized tires
will cause a shock when releasing the
4WD mode even when driving straight
ahead, or will result in deteriorated
fuel consumption. Be sure to use tires
of the same size on all of four wheels.
The tire inflation pressure must be set
to the specifications.
6) When attempting to get out of a
immobile state by switchback opera-
tion (switchover between "D" and
"R"), avoid racing the engine with
the lever set in the N position.
7) If the engine or transmission has
failed, the vehicle must be towed with
the front wheels lifted up. In such an
event, the 4WD selector switch must
be set in the FWD position.
A13-411
Fig. 7-15 Transfer solenoid harness
connector
Centrifugal lock-up clutch
Fig. 7-16
A13-413
7-15