Transmission
AUTOMATIC
TRANSMISSION
The
model
3N71B
automatic
transmiSSIOn
IS
a
fully
automatic
Unit
consisting
pnmanly
of
3
element
hydrauhc
torque
converter
and
two
planetary
gear
sets
Two
multiple
disc
clut
ches
a
multiple
disc
brake
a
band
brake
and
a
one
way
sprag
clutch
provide
the
fnctlon
elements
reqUired
to
obtain
the
deSired
fun
tlon
of
the
two
planetary
gear
sets
The
two
planetary
gear
sets
give
three
for
ward
ratIOs
and
one
reverse
Changing
of
the
gear
ratIOs
IS
fully
automatic
In
relation
to
vehicle
speed
and
engine
torque
Input
Vehicle
speed
and
engine
mamfold
vacuum
Signals
are
constantly
fed
to
the
transmiSSIOn
to
prOVide
the
proper
gear
ratIO
for
maximum
effiCiency
and
performance
at
all
throttle
openmgs
The
Model
3N71B
has
SIX
selector
poSitIOns
P
R
N
D
2
1
p
Park
pOSitIOn
posItively
locks
the
out
put
shaft
to
the
transmiSSIOn
case
by
means
of
a
lockmg
pawl
to
prevent
the
vehicle
from
rollmg
either
directIOn
ThiS
pOSitIOn
should
be
selected
whenever
the
dnver
leaves
the
vehicle
The
engme
may
be
started
m
Park
pOSition
R
Reverse
range
enables
the
vehicle
to
be
operated
m
a
reverse
direction
N
Neutral
pOSitIOn
enables
the
engine
to
be
started
and
run
Without
dnvIngthe
vehicle
0
Drive
range
IS
used
for
all
normal
driVing
conditions
Dnve
range
has
three
gear
ratios
from
the
startmg
ratIO
to
direct
dnve
2
2
range
prOVides
performance
for
dnvIng
onshppery
surfaces
2
range
can
also
be
used
for
engine
brakmg
2
range
can
be
selected
at
any
vehicle
speed
and
prevents
the
transmlsslOn
from
shifting
out
of
second
gear
108
Rg
162
Idenllflcatlon
number
I
1
range
can
be
selected
at
any
vehicle
speed
and
the
transmiSSIOn
will
shift
to
second
gear
and
remain
m
second
until
vehicle
speed
IS
reduced
to
approximately
25
to
31
MPH
1
range
posItion
prevents
the
transmiSSIOn
from
shlftmg
out
of
low
gear
ThiS
IS
par
tlcularly
benefiCial
for
mamtamIng
maximum
engine
brakmg
when
continUOUS
low
gear
operation
IS
deSirable
The
torque
converter
assembly
IS
of
welded
constructIOn
and
can
not
be
dlssassembled
for
service
FlUld
Recommendatwn
Use
automatic
transmiSSIOn
flUid
haVing
DEXRON
IdentificatIOns
only
m
the
3N71B
automatic
transmiSSIOn
denttficatwn
Number
Stamped
posttwn
The
plate
attached
to
the
rIght
hand
Side
of
transmission
case
as
shown
m
Figure
161
denttficatwn
of
number
arrangements
See
Page
109
RECOMMENDATIONS
Due
to
the
compleXity
of
setting
up
a
disassembled
transmissIOn
as
well
as
the
special
tools
necessary
It
IS
recommended
thaL
nternal
epalrs
be
left
to
a
fully
eqUip
ped
shop
Specifications
RECOMMENDED
LUBRICANT
SPECI
f
ICATIONS
Item
SpeCificatiOnS
Remarks
SAE
ClaSSIfIcatIon
Furthermore
refer
to
GasolIne
engme
011
SD
or
SE
SAE
recommended
VISCOSity
table
See
Page
GI
5
Transmission
and
API
GL4
0
steenng
l
Dlfferenllal
I
API
GLS
Automallc
TIM
flUId
Type
DEXRON
MultIpurpose
grease
NLGI2
LIthIUm
soap
base
Brake
and
clutch
flUId
OOT3
Antifreeze
coolant
Long
LIfe
Coolant
130
