2001 AUDI A4 check

39-58


Installing
Installation is reverse of removal, noting the following: - Pull Torsen differential off output shaft toward rear.

Note:
Lightly coat sealing surface -D- with gear oil to prevent the seal from
slipping. - Check for alignment bushing (arrow A) and (arrow B).
- Install gasket
- Slide cleaned magnet into cast holding pocket -1- in intermediate
flange.
Pa
ge 14 of 29 Center differential, servicin
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39-59

- Add 200 ml. gear oil to output housing
(comparable to gear oil, topping up on removed
and disassembled center differential page 39
-
43
).

- Install Torsen differential onto splines of output shaft and bottom spur
gear while turning slowly.
- Check whether installed Torsen differential can be turned by hand.

- Install fully assembled transfer housing with installed spur gears and
rear drive flange onto transmission flange.
- Insert bolts for transfer housing and tighten to final tightening torque in
diagonal sequence in several stages.
- Bolt driveshaft to transmission flange page 39
-79
, Driveshaft,
removing and installing.
- Fill transfer housing with gear oil and check oil level page 39
-40
.
Pa
ge 15 of 29 Center differential, servicin
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11/20/2002 htt
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yp
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pair&id=AUDI.B5.AT01.39.4

39-64

Installing
Installation is reverse of removal, noting the
following:

Tightening torques - Drive O-ring in to stop using 3402 pressure piece.
- Secure output flange with socket-head bolt.
- Bolt driveshaft to transmission flange page 39
-79
, Driveshaft,
removing and installing.
- Fill transfer housing with gear oil and check oil level page 39
-40
.
Component
Nm
Socket-head bolt for rear drive flange 25
Heat shield for driveshaft to transmission 23
Pa
ge 20 of 29 Center differential, servicin
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yp
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pair&id=AUDI.B5.AT01.39.4

39-65

Seal in intermediate flange for front final
drive, replacing


Note:

An inspection opening is provided on the left side of the intermediate
flange to check for oil leaks (arrow) for the seal in drive pinion and the
seal in intermediate flange.
If oil escapes at this inspection opening, this double seal must be
replaced.
Special tools and equipment

3404 thrust piece
Pa
ge 21 of 29 Center differential, servicin
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pair&id=AUDI.B5.AT01.39.4

39-66

Removing

- Remove center differential page 39
-56
.

- Remove intermediate flange for front final
drive.

Installing
Installation is reverse of removal, noting the following: - Drive seal (arrow) out in direction of transfer gear using mandrel.
- Check seal seat in transmission housing for damage; rework if
necessary.

Note:
If installing the intermediate flange to the output shaft carelessly, the
sealing lip of the seal can be damaged. - Slide seal onto 3404 thrust piece so that the larger and projecting outer
ring (arrow) of seal faces tool.
- Drive in seal up to 3404 thrust piece stop.
- Install center differential page 39
-58
.
Pa
ge 22 of 29 Center differential, servicin
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11/20/2002 htt
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yp
e=re
pair&id=AUDI.B5.AT01.39.4

39-67

Seal in drive pinion, replacing


Note:

An inspection opening is provided on the left side of the intermediate
flange to check for oil leaks (arrow) for the seal in drive pinion and the
seal in intermediate flange.
If oil escapes at this inspection opening, this seal must be replaced.
Special tools and equipment

Removing
3403 thrust piece
- Remove center differential page 39
-56
.
- Remove intermediate flange for front final drive.
- Carefully pull off drive pinion from driveshaft.
Pa
ge 23 of 29 Center differential, servicin
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11/20/2002 htt
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pair&id=AUDI.B5.AT01.39.4

39-72

Installing
Installation is the reverse of removal. Also carry
out the following procedure.

- Check needle bearing seat in transfer housing
for damage, rework if necessary.

- Using commercially available hot air blower,
uniformly heat up outside of transfer housing in
vicinity of needle bearing seat to approx. 100 C.
WARNING!

Wear protective gloves!

- Place 2080A sleeve onto new needle bearing -1-.
- Drive needle bearing into transfer housing up to stop using VW408A
punch.
Pa
ge 29 of 29 Center differential, servicin
g
11/20/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.AT01.39.4