MG MGB User Manual

Fd
THE AUTOMATIC
GEARBOX
is
cold,
the
correct
level will
be
‘1‘56'in.
(8 mm.)
below
the
‘MAX’ mark.
The
correct
checking
procedure
is
as
follows.
1.
With the
car
standing level apply the hand
brake and
move
the selector
lever
to
‘P’.
2. Start
the
engine
and
run
it
at
idle speed for
two
minutes.
3.
With the
engine
still idling
in
‘P’,
withdraw
the
dipstick
from the ■ller
tube and
wipe it
with
a
clean
piece
of
paper, or
nylon
material.
Do
not
use
rag.
4. Reinsert the dipstick, withdraw'
it again
immediately
and check the ■uid
level
indication.
Topping
up
fluid
5. Withdraw
the
dipstick and add the
required
quantity
of
a
recommended
Automatic Transmission Fluid
through
the combined
dipstick/
filler
tube. Use
only
a
recommended ■uid;
observe scrupulous
cleanliness;
DO NOT OVERFILL.
The difference
between the
‘MAX’ and ‘MIN’
marks
on
the
dipstick
is
equivalent
to
1
pint
(1.2
US.
pints;
.57
litres).
Refilling
after draining
6. The
quantity
of ■uid
required
when
refilling
will
depend
on
the
amount
still
remaining in
the
torque
converter,
which
can
be
up
to
5
pints
(6
US.
pints;
2.8
litres).
IMPORTANT—Do
not
re-use
■uid
showing
signs
of
contamination.
Towing
for
recovery
NOTE—The
car
cannot
be
tow-started.
7.
If the
transmission is operating
satisfactorily the
car
may
be towed
with the
selector
at
‘N’ after
ensuring
that
the
■uid
is
at
the
correct
level, for
distances
up
to
40
miles
(64 km.)
at
a
speed
not
exceeding
30
m.p.h.
(48
km.p.h.). If the
transmission
is
inoperative
or
if
there
is
reason
to suspect
a
fault
or
damage,
or
the
towing
distance
or
speeds
exceeds
the
limits
given,
the
propeller
shaft
must
be disconnected,
or
alternatively,
the
car
towed with the
rear
wheels
clear of the
ground.
Section
Fd.3
ROAD TEST PROCEDURE
In order
to
ascertain
the
precise
nature
of
a
fault
it is
first
essential
to
thoroughly
investigate
the
effect.
The following
test
procedure
must
be carried
out
in its
entirety
before
referring
to
‘FAULT
DIAGNOSIS’ (Section
Fd.4).
Preliminary
checks
1.
Check
the ■uid
level
(Section
Fd.2),
and
top
up
if
necessary.
’
Fd.12
Check
the
adjustment
of the
down-shift
and throttle
cable
as
described
in
Section Fd.7.
Fully
depress
the
accelerator pedal
to
the kick-down
position and check that
the
carburetter
is
fully
open.
Stationary
tests
4.
Check
the
operation
of
the
starter
inhibitor
switch;
the
starter
should
only
operate
when the
selector
is in
‘P’
or
‘N’.
Check that
the
reverse
lights
operate
only when
the
selector
is in
‘R’.
With
the
engine
idling
and
the
brakes
applied check
that forward
drive
is
obtained when
‘D’, ‘L2’, and
‘L1’
are
selected
and
reverse
drive
is
obtained when
‘R’
is
selected.
With
‘P’ selected
check
that the selector
lever
is
trapped by the
gate.
Stall the
transmission
in
‘L1’ and ‘R’
as
described
in
Section Fd.6
and check for
slip and clutch
squawk.
NOTE—Do
not
stall
for
longer than 10
seconds.
Driving
tests
9.
10.
ll.
13.
14.
15.
l6.
17.
Select ‘D’,
release the
brakes
and accelerate
with
minimum
throttle
opening.
Check
the
172
and
273
shift
speeds
against
the table.
NOTE.——At
minimum
throttle
openings the shifts
may
be difficult
to
detect.
Stop and
restart,
using
full-throttle
acceleration,
i.e.
pedal
at
detent.
Check
1—2 and
213
shift
speeds
against
the
table.
At
35 m.p.h.
(56
km.p.h.)
in
third
gear,
depress
the
accelerator
to
the full
throttle
position;
the
car
should
accelerate
in
third
gear
and
should
not
down-shift
to
second.
At 45 m.p.h. (72
km.p.h.)
in
third
gear,
depress the
accelerator
through
the
kick-down
position;
the
transmission
should
down-shift
to
second
gear.
At 15 m.p.h.
(24
km.p.h.)
in
third
gear,
depress the
accelerator
to
the
kick-down
position;
the
transmission
should
down-shift
to
first
gear.
Stop and
restart
using
forced
throttle
or
kick-down
acceleration.
Check
172 and
273
shift
speeds
against
the
table.
At
40 m.p.h.
(64
km.p.h.)
in
third
gear,
release the
accelerator
and select
‘L2’. Check for
3—2 downshift
and
engine
braking,
also the
2—1
roll-out down-shift
and
engine
braking.
Stop,
and with
‘L2’ selected
use
,full
throttle
to
accelerate
to
45 m.p.h.
(72 km.p.h.).
Check for
1—2
shift
speed clutch
slip
and squawk.
At 25 m.p.h. (40
km.p.h.)
in
‘L2’, release
the
accelerator
and select
‘Ll’. Check the
2—1
downshift
speed
and
for
full
engine
braking.
MGB.
Issue
1.
15676

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English