2000 BMW 540i heat

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Manual Transmission
- Thoroughly clean guide sleeve mounting bolts, sealing sur-
faces, and threads. Apply
Loctite8243 or equivalent thread
locking compound to guide sleeve bolts. Reinstall guide
sleeve and
spacer(s).
Tightening torques
Guide sleeve to transmission case
M6 10 Nm (89 in-lb)
* M8 x 22 18 Nm (13 ft-lb)
- Max30 25 Nm (18 ft-lb)
- Reinstall transmission.
TRANSMISSION REMOVAL AND
~NSTALLATION
Removal and installation of the transmission is best accorn-
plished on a lifl using a transmission jack.The engine must be
supported using appropriate support equipment. This allows
the engine to pivot on its mounts to access the upper
Torx-
head bolts at the bellhousing.
WARNING-
Male sure the car is stable and well supported at all times.
Use a professional aulomorive lift or jack slanos des~gned
lor the purpose. A floor jack is nor adequare supporr.
The removal of the transmission may upset the balance
of the vehicle on a
lifl.
Transmission, removing and installing
- Disconnect negative (-) cable from battery.
CAUTION-
Prior to disconnecting the battery, read the battery discon-
nection cautions given
in 001 Warnings and Cautions.
V-8 engine: Remove plastic engine cover.
Early models: pry out protective caps (arrows), then re-
move nuts securing cover. Lift off cover.
Later models: depress four studs to release, then
lift off
cover.
- Raise and safely support vehicle
- Remove engine splash shield from underside of vehicle
- Remove exhaust system and heat shields. See 180 Exhaust
System.

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--.
- - Manual Transmission
- V-8 engine: Remove heat shield from left front axle support.
< V-8 engine: Remove engine speed reference sensor from
transmission.
- Where applicable, remove brackets for transmission under-
body protection (adjacent to transmission).
4 Support transmission with transmission jack.
- Where applicable, remove reinforcing cross brace from
below driveshaft at transmission.
- Disconnect harness connector from back-up light switch
on transmission.
- Free harnesses for oxygen sensors and back-up lights
from crossmember and transmission.
Remove transmission crossmember: Remove transmission mount bolts
(A).
Remove transmission crossmember bolts (B)
Where applicable, remove bolts (C).
NOTE-
5-speed transmission shown in illustration. Crossmember
assembly for 6-speed transmission is similar.
Disconnect driveshaft from transmission and hang to one
side. See
260 Driveshaft.
I CAUTION- I
Do not damage constant velocity joint orprotective boot at
rear differential.
- 6-cylinder engine: Remove stabilizer bar links and swivel sta-
bilizer bar
u~wards.

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- .- -
Automatic Transmission
Electronics are used to control the operation of these auto-
matic transmissions. Steptronic transmission functions are
also programmed into the transmission control module
(TCM). The TCM monitors transmission operation for faults
and alerts the driver by illuminating the transmission fault indi-
cator on the instrument panel. Diagnostic trouble codes
(DTCs) stored in the TCM may be downloaded and interpret-
ed by trained technicians using special BMW diagnostic
equipment.
Some minor automatic transmission problems can be cor-
rected by changing the automatic transmission fluid (ATF)
and filter. Begin by checking ATF level and condition.
Checlc
to see if the fluid is dirty or has a burned odor indicating over-
heated fluid. The burned odor may be the results of burned
discs in theclutch paclts. The friction material from the burned
disc can clog valve body passages.
NOTE-
The E39 automatic transmission is not equipped with a dip-
stick.
Checking the ATF level must be done while monitoring
the ATF temperature with the engine idling. The
BMW dealer
is equipped with the special equipment to make this check.

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Automatic ~ransmissionl
II I
4 Install engine support across engine bay. Raise and safely
support vehicle.
Make sure the car is stable and
we1 supported at all times.
Use a professional automotive lift
orjaclc stands designed for
CAUTIOI\C
Removal of transmission will cause engine to tip unless en-
gine support is used.
- Remove splash shields from underside of vehicle.
- &cylinder models: Detach front stabilizer bar from stabilizer
bar
links. Swivel stabilizer bar upward.
- Drain ATF from transmission as described earlier.
- Remove exhaust system and exhaust heat shield. See 180
Exhaust System.
- Disconnect driveshaft from transmission and hang to one
side. See
260 Driveshaft.
4 With selector lever in park:
Hold
linkage clamping bolt (A) stationary when loosening
selector lever cable clamping nut
(6).
- Loosen cable clamping nut and remove cable from bracket
(ASS
3252 transmission shown).
- Where applicable, disconnect vehicle speed sensor harness
connector.
4 Disconnect main electrical harness connector(s) from trans-
mission by turning bayonet lock
ring(s) (arrows) counter-
clocltwise.
A4S
310R transmission: Harness connector at right rear of
transmission.
ASS
360R / ASS 390R transmission: Harness connector
(arrow) at right rear of transmission.
ASS 3252 transmission: Two connectors (arrows) on left
side of transmission.
ASS 5602 transmission: Harness connector at right rear of
transmission.
- ASS 4402 transmission: Harness connector at top left rear
of transmission.
- Remove wiring harness from transmission housing

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Gearshift Linkage
- Connect selector rod to shift lever. Lift transmission, install
crossmember and tighten crossmember bolts.
Install driveshaft and heat shield. See
260 Driveshaft.
Reinstall exhaust system. See 180 Exhaust System.
. Lower vehicle. Install shift boot. Push shift ltnob on lever.
Tightening torque
Driveshaft
CV joint to final drive flange
. MI0 (Tom bolt)
70 Nm (51 ft-lb)
. M8 (compression nut) 32 Nm (24 ft-lb) - Driveshaft clamping sleeve
- MI0 ribbed nuts
80 Nm (59 ft-lb)
MI0 compressed nuts 64 Nm (47 ft-lb)
Flex-disc to driveshaft or transmission flange
MlO (8.8 grade) 48
Nm (35 ft-lb)
. MI0 (10.9 grade) 60
Nm (44 ft-lb)
- MI2 (10.9 grade) 100 Nm (74 ft-ib)
MI4 140 Nm (103 fi-lb)
Transmission crossmember
. to transmission 21 Nm (15 ft-lb)
. to chassis 42 Nm (30 ft-lb)

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-.- .
/ Driveshaft Driveshaft, removing
CAUTION-
. Be sure the wheels are off the ground before removing the
driveshak Set the parl(ing brake before removing the
driveshaft.
Once the driveshaft has been removed, the vehicle can
roll regardless of whether the transmission is in gear or
not.
The driveshaft is mounted to the transmission and final
drive
with self-locliing nuts. These nuts are designed to
be used only once and should be replaced during reas-
sembly.
Remove complete exhaust system. See
180 Exhaust
System.
- Remove exhaust heat shields.
- Support transmission with transmission jack.
< Loosen transmission mount nuts (arrows) on real
transmission support crossmember.
- Release wiring harness retainers from rear transmission
support crossmember.
< Remove mounting bolts (arrows) for rear transmission sup-
port crossmember. Slide crossmember rearward to remove.
- Matchmark front and rear driveshaft halves to corresponding
transmission output and final drive input flanges.
4 Remove nuts securing driveshaft mounting bolts at transmis-
sion output flange. Counterhold bolts (arrows) at transmis-
sion flex-disc. Discard old nuts.
- Hang driveshaft front section from body using stiff wire.

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260-1 0
/ Driveshaft
Driveshaft, installing
- Prepare CV joint for reinstallation:
Extend joint to limit.
Clean off old grease and fill with fresh grease
Install new seal.
- Bend driveshaft slightly at center universal joint to install
CAUTION-
Do not allow CVjoint seal to become displaced.
- Align matchmarlts on driveshaft to matchmarks on final drive
and transmission flanges.
- Fit constant velocity joint to final drive input flange. Alternate-
ly tighten two opposite nuts to draw constant velocity joint
evenly into the final drive input flange. Once seated, tighten
down remaining nuts.
I CAUTION-
I Do not reuse self-locking nuts. These nuts are designed to be /
I used onlv once. 1
- Insert bolts in front of driveshafl to transmission output
flange. Counterhold each bolt while tightening nut.
CAUTION-
. Do not reuse self-locking nuts. These nuts are designed to
be used only once.
Avoid stressing the flex-disc when torquing the bolts.
Do this by counterholding the bolts and turning the nuts
on the flange side.
- Position center support bearing and install mounting nuts.
Use new self-locking nuts.
- Install heat shields.
- Install rear transmission support crossmember.
- Install exhaust system. See 180 Exhaust System.
Reconnect oxygen sensor wiring harnesses and reattach
wiring harness retainers to rear transmission support
crossrnernber.

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Steering and Wheel ~li~nrnentl
Steering gearbox, removing and installing
- Disconnect negative (-) battery cable. See 020 Mainte-
nance.
CAUTION-
Prior to disconnecting the battew read the battery discon-
nection cautions given in
001 General Cautions and
Warnings.
- Remove airbag unit from steering wheel. See 721 Airbag
System (SRS).
WARNING -
Improper handling of the airbag could cause serious injury
Store the
airbag with the horn pad facing up. If stored lacing
down, accidental deployment couldpropel it violently info the
air, causing
injuv
- Remove steering wheel as described earlier.
- Drain power steering system reservoir.
- Raise front of car.
WARNING -
Make sure the car is firmly supported on jack stands de-
signed for the purpose. Place jack stands beneath structural
chassis points. Do not place jack stands under suspension
Darts.
- Remove heat shield from left side of subframe.
- Remove fluid hoses from top of steering gearbox. Immedi-
ately plug all fluid openings.
Remove and discard
pitman arm self-loclting nut (arrow).