Trouble
No
shock
at
change
from
I
to
2
range
or
engine
races
extremely
Failure
to
change
from
3rd
to
2nd
when
shifting
lever
into
I
range
Engine
brake
does
not
upcrate
in
1
range
Gear
change
frum
I
sr
lu
2nd
or
from
2nd
to
3rd
in
I
range
Does
not
change
f
rom
2nd
to
1st
in
range
Large
shock
changing
from
2nd
to
1st
in
range
Vehicle
moves
when
changing
into
P
range
or
parking
gear
does
not
disengage
when
shifted
out
of
P
range
Transmissic
m
overheats
Oil
shoots
out
during
operation
White
smoke
emitted
from
exhaust
pipe
during
operation
Offensive
smell
at
oil
charging
pipe
Transmission
noise
in
p
and
N
ranges
Transmission
noise
in
D
2
I
and
R
ranges
Automatic
Transmission
ABeD
E
F
G
H
I
J
K
L
1M
NO
P
1m
n
q
r
s
t
u
v
Iw
x
y
6
7
5
@
@
I
I
2
3
4
I
I
2
1
57
6
3
@@
@
I
2
4
5
3
@
f
1
2
@
1
2
4567
3
@
2
1
3
@
2
4
I
2
I
3
4
2
6
8
7
5
@@@
Q
@@
@
I
3
5
6
2
7
8
4
@@@
Q
@@
@
1
2
O
G
@@
f
@@
@
1
2
10
I
I
2
0
G
@
@
AT
56
Automatic
Transmission
TROUBLE
SHOOTING
GUIDE
FOR
3N71B
AUTOMATIC
TRANSMISSION
Order
Test
item
Checking
Oil
level
gauge
2
Downshift
solenoid
3
Manuallinkage
L
4
Inhibitor
switch
5
Engine
idling
rpm
6
Vacuum
pressure
of
vacuum
pipe
7
Operation
in
each
range
8
Creep
of
vehicle
Stall
test
I
Oil
pressure
before
tesling
1
2
Stall
test
3
Oil
pressure
after
testing
Road
test
Slow
acceleration
I
st
2nd
2nd
3rd
2
Quick
acceleration
lst
2nd
2nd
3rd
3
Kick
down
operation
3rd
2nd
or
2nd
1st
Procedure
Check
gauge
for
oil
level
and
leakage
before
and
after
each
test
Check
for
sound
of
operating
solenoid
when
depressing
accelerator
pedal
fully
with
ignition
key
ON
Check
by
shifting
into
P
lR
IN
D
2
and
I
ranges
with
selector
lever
Check
whether
starter
operates
in
N
and
p
ranges
only
and
whether
reverse
lamp
operates
in
R
range
only
Check
whelher
idling
rpm
meet
standard
Check
whether
vacuum
pressure
is
more
than
450
mmHg
in
idling
and
whether
it
decreases
with
increasing
rpm
Check
whether
transmission
engages
positively
by
shifting
N
0
N
2
N
l
I
and
N
R
range
while
idling
with
brake
applied
Check
whether
there
is
any
creep
in
D
2
R
ranges
and
Measure
line
pressures
in
D
2
I
and
R
range
while
idling
Measure
engine
rpm
and
line
pressure
in
D
2
I
and
R
ranges
during
full
throttle
operati
n
Notes
a
Temperature
of
torque
converter
oil
used
in
test
should
be
from
600
to
1000C
1400
to
2120F
i
e
sufficiently
warmed
up
but
not
overheated
b
To
cool
oil
between
each
stall
test
for
D
2
I
and
R
ranges
idle
engine
i
e
rpm
at
about
1
200
rpm
for
more
than
1
minute
in
P
range
Measurement
time
must
not
be
more
than
5
seconds
Same
as
item
I
Check
vehide
speeds
and
engine
cpm
in
shifting
up
Ist
2nd
range
and
2nd
Jo3rd
range
while
running
with
lever
in
D
range
and
engine
vacuum
pressure
of
about
200
I11I1lHg
Same
as
item
1
above
except
with
engine
vacuum
pressure
of
0
mmHg
i
e
in
position
just
before
kickdown
Check
whether
the
kickdown
operates
and
measure
the
time
delays
while
running
at
30
40
50
60
70
km
h
18
25
30
37
43
MPH
in
D3
range
AT
57
