Datsun 1980 200SX Service Manual page 268

AUTOMATIC TRANSMISSION
Trouble shooting and Diagnoses
Order
Test
item
4 Shift down
Ds
02 D1
5 Shift down
D
12 11
6 Shift down
0 2
7 Shift
up
11 l 12
8 Shift
up
or
down
when
start
ing
in
2
range
9
Parking
Others Abnormal shock
oil leakage
Procedure
Check
car
speeds and engine
rpm in
shifting
down from 3rd
2nd
1st
sequentially
while
coasting
with accelerater
pedal released
in
D3
range
and
engine vacuum
pressure of
about
60 0 kPa 450
mmHg 1772 inHg
Check for shifting
down D I
and engine braking
and
further for
shifting
down I I and
engine braking after
shifting
the lever into I
range
with the
accelerator
pedal
released and the
engine
vacuum pressure
of 0 kPa 0
mmHg
o
inHg
while
driving at
about 50 km h 30 MPH in
D3
range
Check for
quick shifting
down 0 2 and
engine braking
after
shifting
the lever into 2
range
while driving
at
about
50
km h 30
MPH
in 0
range
Also check for locking
of
the
transmission in 2nd gear ratio
regardless of
car
speed
Check for failure of the transmission to
shift
up
during
acceleration when
starting
in
range
Check
the transmission for
not shifting
up or
down
during
acceleration
or
deceleration when
starting
in 2
range
Confirm that vehicle will
not
move on
grade
when shifting to
P
range
Enter into
record
conditions
observed during these
tests such
as
gear noise
abnormal clutch
noise and
acceleration
per
formance
AT 51