Removing and installing clutch valve for all-wheel drive N445 or clutch valve 2 for all-wheel drive N446, 0BE, 0BF — AUDI

Removing and installing
clutch valve for all-wheel drive
N445
or
clutch valve 2 for all-wheel drive
N446
, 0BE, 0BF
Special tools and workshop equipment required
Socket (4 mm)
T10370
Note
Refer to general repair instructions
Chapter
.
Observe safety precautions
Chapter
.
Caution
Malfunctions on rear final drive.
Do NOT interchange fitting location of
clutch valve for all-wheel drive
N445
with fitting location of
clutch valve 2 for all-wheel drive
N446
.
Removing
Ignition is switched off.
Place vehicle on lifting platform.
Lower rear section of exhaust system slightly and secure.
Remove bracket for wiring harness from rear final drive
Anchor
.
Note
Mark connectors
1 ... 4
for
oil pressure and oil temperature senders
and
clutch valves
.
Unplug connectors
1
and
2
.
Unplug connector
3
from
clutch valve 2 for all-wheel drive
N446
/ connector
4
from
clutch valve for all-wheel drive
N445
.
Position
drip tray
under rear final drive.
Unscrew bolts
1
of corresponding
clutch valve
using
4 mm socket
T10370
Carefully prise out
clutch valve
e.g. using a flat screwdriver; observe spring
3
. Spring can fall out of opening in hydraulic control unit
6
.
A
=
clutch valve 2 for all-wheel drive
N446
, brown colour coding
B
=
clutch valve for all-wheel drive
N445
, black colour coding
Installing
Ball
5
, guide
4
(small diameter facing spring) and spring
3
must be installed in opening in housing
6
for
clutch valve
2
.
Install new
clutch valve
with new O-rings
arrows
(coat O-rings with ATF).
Pre-tighten bolts
1
evenly hand-tight until they make contact. Then tighten to specified torque
Item
.
Perform remaining installation operations in reverse order of removal. Note the following:
Note
Allocation of connectors for
oil pressure and oil temperature senders
and at
clutch valves
:
1
= connector for
oil pressure and oil temperature sender 2
G640
2
= connector for
oil pressure and oil temperature sender
G437
3
= connector for
clutch valve 2 for all-wheel drive
N446
4
= connector for
clutch valve for all-wheel drive
N445
Attach bracket for wiring harness to rear final drive
Anchor
.
Top up ATF in rear final drive
Chapter
.
Attach rear section of exhaust system to body and perform stress-free alignment
Rep. gr.
26
Exhaust pipes/silencers; Exploded view - silencers
.