1998 BMW M3 engine

240-
4



AUTOMATIC
TRANSMISSION

TRANSMISSION
REMOVALAND

INSTALLATION

Removal
and
installation
of
thetransmission
is
best
accom-

plished
on
a
lift
using
a
transmission
jack
.
Use
caution
and

safe
workshop
practices
when
working
beneath
car
and
low-

ering
transmission
.

WARNING
-

To
lift
the
vehicle
safely,
see010
Fundamentals
for
the
Do-it-Yourself
Owner
.

CAUTION-

"
Be
sure
the
vehicle
is
properly
supported
.
The
removal
of
the
transmission
may
upset
the
bal-
ance
of
the
vehicle
on
a
lift
.

"
Tilting
the
engine
to
remove
the
transmission
can
lead
to
damage
to
various
components
due
to

lack
of
clearance
.
-On
carswith
AST
remove
throttle
body
.
-Remove
brake
fluid
reservoir
if
necessary
.

Torx-head
bolts
are
used
to
mount
thetransmission
to
the

bellhousing
.
Be
sure
to
have
appropriate
tools
on
hand
before

starting
thejob
.

2
.
Install
engine
support
across
engine
bay
.
Raise
and

safely
support
vehicle
.
See
Fig
.
6
.

WARNING
-
"
When
raising
thecar
using
a
floor
jack
or
a
hy-
draulic
lift,
carefully
position
the
jack
pad
to
pre-
vent
damaging
the
car
body
.
A
suitable
liner
(wood,
rubber,
etc
.)
should
be
placed
between
the
jack
and
the
car
to
prevent
body
damage
.

"
Watch
the
jack
closely
.
Make
sure
it
stays
stable
and
does
not
shift
or
tilt
.
As
the
car
is
raised,
the
car
may
roll
slightty
and
the
jack
may
shift
.

CAUTION-

Removal
of
transmission
will
cause
engine
to
tip
unlessengine
support
is
used
.

TRANSMISSION
REMOVAL
AND
INSTALLATION

Fig
.
6
.
Engine
support
equipment
used
to
support
engine
from
above

before
removing
transmission
.

3
.
Raise
vehicle
to
gain
access
to
underside
of
car
.

4
.
Drain
ATF
from
transmission
as
described
earlier
.

5
.
Disconnect
oxygen
sensor
harness
.
Remove
exhaust

system,
and
exhaust
heat
shield
.
See
180
Exhaust

System
.

Transmission,
removing
and
installing



6
.
Remove
driveshaft
.
See
260
Driveshaft
.

1
.
Disconnect
negative
(-)
cable
from
battery
.



7
.
With
selector
lever
in
Park,
disconnect
shift
selector
le-

ver
cable
from
lever
and
remove
cable
bracket
.
Hold

CA
UTION-



linkage
clamping
bolt
stationary
when
loosening

Prior
to
disconnectiog
the
battery,
read
the
battery



clamping
nut
.
See
Fig
.
7
.

disconnection
cautions
given
at
the
front
of
this
manual
on
page
vi¡¡
.

Fig
.
7
.



Selector
lever
cable
clamping
nut
(A)
.
Loosen
cable
clamping
nut
(B)
and
remove
cable
from
bracket
.
Always
counterholdclamping
bolt
when
loosening
nut
.

8
.
Disconnect
main
harness
connector
from
transmission

by
turning
its
bayonet
lock
ring
counterclockwise
.
Re-

move
wiring
harness
from
transmission
housing
.
See
Fig
.
8
.

Fig
.
8
.



Harness
connector
at
automatic
transmission
.

9
.
Where
applicable,
disconnect
harness
connector
from

speed
sensor
at
top
óf
transmission
.

10
.
Disconnect
transmission
cooler
line
clamps
from
en-

gine
.
Disconnect
lines
from
transmission
.

11
.
Support
transmission
with
transmission
jack
.
Remove

reinforcing
cross
brace
(if
applicable)
and
transmission

support
crossmember
.

NOTE-

Note
installation
positionof
support
crossmember
.

12
.
Remove
access
plug
in
cover
plate
on
right
side
of
en-

gine
block
and
remove
torqueconverter
bolts
.
Turn

crankshaft
to
access
boits
.
See
Fig
.
9
.

AUTOMATIC
TRANSMISSION



240-
5

Bellhousing
access
hole

Socket
wrench

Fig
.
9
.



Access
andremove
torque
converter
boits
through
hole
in
bellhousing
cover
.

0

A

fij
13
.
Remove
bellhousing-to-engine
mounting
bolts
.
See



Fig
.
10
.
Transmission-to-engine
Torx-head
mounting
bolts
.
Fig
.
10
.

0012592

TRANSMISSION
REMOVAL
AND
INSTALLATION

240-
6



AUTOMATIC
TRANSMISSION

14
.
Remove
transmission
by
pulling
back
and
down
.
Lower

jack
to
allow
transmission
to
clear
vehicle
.



Tightening
Torques

"
ATF
drain
plug
to
ATF
sump

CA
UTION-



MS
270R/A4S
310R
....
..
....
.
..
25
Nm
(18
ft-Ib)

Do
not
allow
the
torque
converter
to
fati
off
the



ASS
310Z(M10
plug)
..
..
..
.
.
..
.
..
16
Nm
(12
ft-Ib)

transmission
inputshaft
.



"
ATF
fill
plug
to
ATF
sump

MS
270R/A4S
310R
..
..
....
..
..
.
33
Nm
(24
ft-Ib)

15
.
Installation
is
reverse
of
removal,
noting
the
following
:



MS
310Z(M30
plug)
......
.
.
..
.
.
100
Nm
(74
ft-Ib)

"Blowoutofcoolerlineswithlow-pressurecompressed



"
ATF
cooler
lines
(A4S
270R/A4S
310R)

air
and
flush
coolerwith
clean
ATF
twice
before
reat-



Coupling
nuts
............
.
.
..
..
.
20
Nm
(15
ft-Ib)

taching
lines
to
transmission
.



Hollow
bolts
.........
.
.....
..
..
.
37
Nm
(28
ft-Ib)

"
Reinforcing
cross
brace

CAUTION-



to
chassis
(M10)
.............
.
..
.
42
Nm
(31
ft-Ib)

"
Wear
safety
glasses
when
working
with
com-



"
Torque
converter

pressedair
.



to
driveplate
(M10)
.........
..
.
..
45
Nm
(33
ft-Ib)

"
Transmissionsupport
crossmember
to
chassis

"
Do
not
reuse
ATF
after
flushing
.



M8
......................
22-24
Nm
(16-17
ft-1b)

M10
................
.
....
..
.
..
42
Nm
(31
ft-Ib)

"
Install
new
sealing
washers
on
hollow
bolts
.



"
Transmissíon
to
engine
(Torx-head
with
washer)

"
Insta¡¡
new
O-rings
on
transmission
cooler
lines,
where



M8
......................
..
.
..
21
Nm
(15
ft-Ib)

applicable
.



M10
.....................
..
..
.
42
Nm
(31
ft-Ib)

"
Inspect
driveplate
for
cracks
or
elongatedholes
.
Re-



M12
................
.
....
..
.
..
72
Nm
(53ft-Ib)

place
if
necessary
.

"
Check
to
be
sure
torque
converter
is
seated
correctly

in
transmission
during
final
installation
.

"
When
mounting
transmission
to
engine,
the
three

mounting
tabs
on
torque
converter
must
be
aligned

with
indentations
on
driveplate
.
Use
an
alignment

dowel
to
line
up
bolt
holes,
if
necessary
.
"
Fill
transmission
with
clean
ATF
until
oil
leve¡
is
even
with
fill
hole
.
Then
check
fluid
leve¡
as
described
ear-
lier
.

"
Adjust
gearshift
mechanism
.
See
250
Gearshift
link-

age
.

NOTE-

Torx-head
mounting
bolts
shouldalwaysbe
used
with
washers
to
prevent
difficult
removal
.

TRANSMISSION
REMOVAL
AND
INSTALLATION

250-2



GEARSHIFT
LINKAGE

5
.
Remove
driveshaft
.
See260
Driveshaft
.



9
.
Release
gearshift
lever
retaining
ring
from
below
by

turningspecial
tool
90°(
1
/4
turn)
counterclockwise
.
See

6
.
Support
transmission
with
transmission
jack
.
Remove



Fig
.
4
.

crossmember
from
rear
of
transmission
.
See
Fig
.
2
.

Fig
.
2
.



Rear
transmission
crossmember
(arrow)
.

7
.
Lower
rear
of
transmission
to
access
gearshift
linkage
.

CAUTION-

Tilting
the
engine
to
lower
thetransmission
can
lead
to
damage
to
various
componente
due
to
lackof
clearance
.
-On
cars
with
AST
remove
throttle
body
.
-Remove
brake
fluid
reservoir
if
necessary
.

0013135

8
.
Working
below
transmission,
disconnect
shift
rod
from

gearshift
lever
.
Note
washers
on
either
side
of
shift
rod

end
.
See
Fig
.
3
.

v

clip

Shift
rod

Fig
.
3
.



Pull
off
shift
rod
retaining
clip
in
direction
of
arrow
(t)
;
disen-
gage
shift
rod
from
gearshift
lever
(2)
.

MANUAL
TRANSMISSION
GEARSHIFT

BMW
Tool
No
.
25
1
110
orequivalent

Fig
.
4
.



Shift
lever
retaining
ring
being
removed
using
BMW
special

tool
25
1
110
.

10
.
Raise
transmission
and
temporarily
instan
transmission

crossmember
.

11
.
Lower
vehicle
.
Working
from
inside
passengercom-

partment,
pull
upon
gearshift
lever
to
remove
it
togeth-

erwith
retaining
ring
and
rubber
grommet
.

Gearshift
lever,
installing

(manual
transmission)

6532

1
.
Instan
shift
lever,
aligninglocking
tabs
with
openings
in

shift
console
.
Press
down
on
retaining
ring
until
it
clicks
into
place
.
See
Fig
.
5
.

\
Retaining

Fig
.
5
.



Shift
lever
retaining
ring
.
Fit
plastic
tabs
into
slots
of
shift
con-
sole(arrows)
.

2
.
Install
rubber
grommet
with
arrow
pointing
forward
.
In-



AUTOMATic
TRANSMISSION
stall
shift
rod
and
shift
boot
.



GEARSHIFT

NOTE-

Install
rubbergrommet
correctly
so
that
is
seals
outwa-
ter
.

4
.
Install
driveshaft
and
heat
shield
.
See
260
Driveshaft
.

Manual
valveleven
(at
transmission)

Fig
.
6
.



Automatic
transmission
gearshift
assembfy
.

Shift
cable

GEARSHIFT
LINKAGE



250-
3

The
automatic
transmission
shift
mechanism
is
shown
in
Fig
.
6
.
Use
the
illustration
as
a
guide
when
servícing
the
gear-
shift
mechanism,
including
shift
cable
replacement
.

3
.
Connect
shift
rod
to
shift
lever
.
Install
transmission

crossmember
.
Lift
transmission
and
tighten
crossmem-



Gearshift
mechanism,
adjusting
ber
bolts
.



(automatictransmission)

NOTE-



1
.
Position
selector
lever
in
Park
.

Beforeconnecting
the
shift
rod
to
the
lever,
be
sure
the



2
.
Raise
vehicle
to
gain
access
to
shift
linkage
.
gearshift
leven
is
facing
the
correct
way
as
illustrated
in
Fig
.
1
.
WARNING
-

Make
sure
thecan
is
stable
and
well
supported
at
all
times
.
Use
a
professional
automotive
lift
or
jack
stands
designed
for
the
purpose
.
5
.
Reinstall
exhaust
system
.
See
180
Exhaust
System
.
Connect
oxygen
sensor
harness
connectors
.



3
.
Loosen
selector
cable
clamping
nut
.
See
Fig
.
7
.

6
.
Lower
vehicle
.
Insta¡¡
shift
boot
cover
.
Push
shift
knob



4
.
Push
shift
lever
forwardtoward
engine(Park
position)
onto
lever
.



while
applying
light
pressure
on
cable
end
.
Tighten
ca-
ble
clamping
nut
.

Tightening
Torques



NOTE-
"
Driveshaft
to
final
drive



Do
not
overtighten
the
nut
so
that
it
twists
the
cable
.
flange
(with
U-joint)
.
..
.
.....
.
.
See
250
Driveshaft

"
Flex-disc
to
driveshaft
or

transmission
flange
...
.
.......
See
250
Driveshaft



Tightening
Torque
"
Transmission
crossmember



"
Shift
cable
clamping
nut
.......
10-12
Nm
(75-9
ft-Ib)
to
body
(M8)
.
.
.
...
..............
21
Nm
(16
ft-Ib)

/S
r\
1
1

Gear
position/
neutral
safetyswitch

Automatic
shilo
solenoid
id

AUTOMATIC
TRANSMISSION
GEARSHIFT

Fig
.
10
.
Align
contact
slide
(1)
with
slot
in
switch
housing
(2)
before
in-
stalling
gear
position/neutral
safety
switch
.

Fig
.
11
.
Engage
release
button
pin
to
hole
in
pull
rod
before
installing

The
automatic
shiftlock
uses
an
electríc
solenoid
to
lock
the
selector
lever
in
P
or
N
.
Depressing
the
foot
brake
withthe
ig-
nition
on
energizes
the
solenoid,
allowingthe
lever
to
be
moved
into
a
drive
gear
.
The
solenoid
is
energized
only
when

the
engine
speed
is
below
2,500
rpmand
thevehicle
speed
is

below
3
mph
.
The
solenoid
ís
mounted
in
the
right-hand
side

of
theselector
lever
housing
.
See
Fig
.
12
.

1
.
With
engine
running
and
car
stopped,
place
selector
le-
ver
in
P
or
N
.

2
.
Without
depressing
brake
pedal,
check
that
selector
le-

ver
is
locked
in
position
P
or
N
.

3
.
Depress
brakepedal
firmly
.
Solenoid
should
be
heard

to
energize
.

GEARSHIFT
LINKAGE



250-
5

Fig
.
12
.
Automatic
shiftlock
prevents
drive
gear
selection
until
the
brakepedal
is
depressed
.

4
.
Check
thatselector
lever
can
now
be
moved
out
of
P
or
N
.

NOTE
-

The
next
test
should
be
performed
in
anopen
area
with
the
parking
brake
on
and
with
extreme
caution
.

5
.
With
selector
lever
in
P
or
N
and
brake
pedal
de-

pressed,
raise
engine
above
2,500
rpm
.
Check
that
se-

lector
lever
cannotbe
moved
outof
P
or
N
.

shift
lever
handle
.



If
any
faults
are
found
check
the
electrical
operation
of
the
shiftlock
solenoid
and
check
for
wiring
faultsto
or
from
the
Automatic
shiftiock,
checking
function



transmission
control
module(TCM)
.
See610
Electrical

(automatic
transmission)



Component
Locations
and
Electrical
Wiring
Diagrams
.

NOTE
-

The
solenoid
is
controlled
viathe
TCM,
using
brakepedal
position,
engine
speed,
and
road
speed
as
con-
trolling
inputs
.

AUTOMATIC
TRANSMISSION
GEARSHIFT

DRIVESHAFT
SERVICE
.
...
.
.
.
...
.
..
.
.
.260-3

Driveshaft,
aligning
...............
.
...
.
.
260-3

Driveshaft,
removing
..............
.
.
.
.
.
.
260-4

260
Driveshaft

DRIVESHAFT
260-1

GENERAL
.
.
.
.
.
.
.
.....
.
.
.
........
.
...
.
260-1



Driveshaft,
installing
.
....
.
..
.
............
260-4

Flex-disc,
replacing
.....
.
.
.
.............
260-5
TROUBLESHOOTING
..
.
.
.
...
.
.........
260-1



Center
bearing
assembly,
replacing
.
......
.260-6
Frontcentering
guide,
replacing
..
.
.......
.
260-7

TABLE

a
.
Driveshaft
Troubleshooting
.
.
...
......
.
....
..
.
.
260-2

GENERAL



NOTE-

For
rear
drive
axlerepair
information,
see330
Rear
The
two-piece
driveshaft
is
joined
in
thecenter
by
a
sliding



Suspension
.
splined
coupling
.
This
coupling
compensates
for
fore
and
aft
movement
of
the
drive
line
.
The
driveshaft
ís
connected
to
the



Driveshaft
noise
or
vibration
may
be
caused
by
worn
or
transmission
bya
rubber
flex-disc
and
to
the
final
drive
by
a



damaged
components
.
Check
the
universal
joints
for
play
.
universal
joint
.
It
is
supported
in
the
micidle
by
a
center
support



With
the
driveshaft
installed,
pull
and
twist
the
driveshaft
while
bearing
.
The
bearing
is
mounted
in
rubber
to
isolate
vibration
.



watching
the
joint
.
The
BMW
specificationfor
play
is
very
See
Fig
.
1
.



small,
so
almost
any
noticeableplay
could
indicate
a
problem
.

TROU
BLESHOOTING



Check
thetorque
of
thefasteners
at
the
flange
connections
.
Check
therubber
of
the
flex-disc
and
center
bearing
for
dete

The
source
of
driveline
vibrations
and
noise
can
be
difficult



rioration
or
tearíng
and
check
for
preload
at
the
center
bearing

to
pinpoint
.
Engine,
transmission,
rear
axle,
or
wheel
vibra-



with
a
visual
inspection
.
Check
the
driveshaft
for
broken
or

tions
can
be
transmitted
through
the
driveshaft
to
the
car



missing
balance
weights
.
The
weights
are
welded
tabs
on
the

body
.
Noises
from
the
rear
of
thecar
may
be
caused
by
final



driveshaft
tubes
.
In
addition
to
inspecting
for
faulty
driveshaft

drive
problems,
orby
faulty
wheel
bearings,
drive
axies,
or



parts,
the
installed
angles
of
the
driveshaft
should
also
be

evenworn
or
improperly
inflatedtires
.



considered
.

Flex-disc

Center
universal
joint

Fig
.1
.



Driveshaft
and
final
drive
assembly
.

Rear
section
Splined
shaft



of
driveshaft
Center
support



`



Clamping
sleeve
bearíng
assembly

Differential
inputflange

0013110

TROUBLESHOOTING

260-2
DRIVESHAFT

Further
inspection
requires
removal
of
the
driveshaft
.

Check
the
front
centering
guide
on
the
transmission
output
flange
for
damage
or
misalignment
.
Also
check
runoutatthe

transmission
outputflange
and
output
shaft,
and
at
the
final

drive
input
flange
.
Check
the
bolt
hole
bores
in
theflange
for

wear
and
elongation
.

Driveshaftflange
runout
(max
.
allowable)

"
Transmission
outputflange

axial
play
...
.
..
...
..
.
.......
0
.10
mm
(0
.004
in
.)

radial
play
.......
...
.
.
.......
0
.07
mm
(0
.003
in
.)

"
Final
driveinput
flange
radial
play
(measured
at

driveshaft
centering
lip)
..
......
0
.07
mm
(0
.003
in
.)

Spinthe
center
bearing
and
check
for
the
smooth
operation

without
play
.
Check
that
thesplines
of
the
sliding
coupling

move
freely
.
Clean
and
lubricate
the
splines
with
molybdenum

disulfide
grease
(Molykote
®
Longterm
2
or
equivalent)
.

Check
the
universal
joints
for
wear
or
binding
.
If
any
joint
isdif-

ficult
to
move
or
binds,
the
driveshaft
section
should
be
replaced
.

Table
a
.
Driveshaft
Troubleshooting

NOTE-

With
the
driveshaft
installed,
theactual
amount
that
the
universal
joints
pivot
is
limited
.
For
the
most
accurate

test,
check
universal
joints
in
their
normal
range
of

movement
.

If
inspection
revealsnothing
wrong
with
the
driveshaft,
it

may
need
to
be
rebalanced
.
This
can
be
done
by
a
speciality

driveshaft
repair
shop
.
Also,
check
the
alignment
ofthe
drive-

shaft
as
described
below
.

NOTE-

Minor
driveshaftvibrations
can
often
be
correctedsim-

ply
by
disconnecting
the
driveshaftat
the
finaldrive,

and
repositíoning
the
driveshaft
90°,
180°
or270°
inre-
lationto
the
final
drive
input
flange
.

Table
a
lists
symptoms
of
driveshaft
problems
and
their

probable
causes
.
Most
of
the
repair
information
is
contained

within
this
repair
group
.

Symptom



Probable
cause



Corrective
action

1
.
Vibration
when



a
.
Incorrect
preload
of
center
bearing
.



a
.
Check
preload
of
center
bearing
.
Readjust
preload
.
See
Fig
.
6
.

starting
off
(forward



b
.
Center
bearing
rubber
deteriorated
.



b
.
Inspect
center
bearing
and
rubber
.
Replace
if
necessary
.
orreverse)
.



c
.



Flex-disc
damaged
or
worn
.



c
.



Inspect
flex-disc
.
Replace
if
necessary
.

TROUBLESHOOTING

d
.
Engine
or
transmission
mounts
faulty
.
I
d
.
Inspect
engine
and
transmission
mounts
.
Align
or
replace,
if
nec-

essary
.

e
.
Front
centering
guide
worn,
or



e
.
Check
front
centering
guide
and
replace
if
necessary
.
Check

driveshaft
mounting
flanges
out
of



runout
of
driveshaft
flanges
.

round
.

f
.



Universal
joints
worn
or
seized
.



f
.



Check
universal
joint
play
and
movement
.
Replace
driveshaft
if

necessary
.

g
.
Sliding
coupling
seized
.



g
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.

Clean
coupling
splines
and
replace
parts
asnecessary
.

h
.
Driveshaft
misaligned
.



h
.
Check
driveshaft
alignment
.

2
.
Noise
during
on/off



a
.
Finaldrive
components
worn
or



a
.
Remove
final
drive
and
repair
.

throttle
or
when



damaged
(excessive
pinion-to-ring-

engagíng
clutch
.



gear
clearance)
.

b
.



Drive
axleor
CV
joint
faulty
.



b
.



Inspect
drive
axles
and
CV
joints
.
Repair
or
replace
as
neces-
sary
.

c
.
Sliding
coupling
seized
.



c
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.

Clean
coupling
splines
and
replace
parts
as
necessary
.

3
.
Vibration
at
25
to
30



a
.
Front
centering
guideworn,
or



a
.
Check
front
centering
guide
and
replace
if
necessary
.
Check
mph
(40
to
50



driveshaft
mounting
flanges
out
of



runout
of
driveshaft
mounting
flanges
.
km/h
).



round
or
damaged
.

b
.
Universal
joints
worn
or
seized
.



b
.
Check
universal
joint
play
and
movement
.
Replace
driveshaft
if
necessary
.

c
.



Flex-disc
damaged
or
worn
.



c
.



Inspect
flex-disc
.
Replace
if
necessary
.

d
.
Center
bearing
rubber
deteriorated
.



d
.
Inspect
center
bearing
.
Replace
if
necessary
.

e
.
Sliding
coupling
seized
.



e
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.
Clean
coupling
splines
and
replace
parts
asnecessary
.

f
.



Misaligned
installed
position
.



f
.



Check
driveshaft
alignment
.