AUDI A8 1998 D2 / 1.G 01V Transmission Center Differential Service Owner's Manual

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
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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
.
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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.
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39-68

WARNING!

Do not reinstall spur gears that have fallen to
the ground. The transmission must be
replaced in this case.

- Drive out seal using drift.

Installing
Installation is reverse of removal, noting the
following:

- Slide seal onto 3403 thrust piece.
- Drive seal in up to 3403 thrust piece stop.
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Note:
If installing the intermediate flange on the output shaft carelessly, the
sealing lips of the seal can be damaged. - Completely cover splines on end of shaft (arrow) with insulating tape
without creasing or overlapping the tape, to prevent damage to seal
when sliding on drive pinion.
- Install drive pinion on center of output shaft. (Installed position page
39
-53
)
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39-69


Needle bearing for spur gear 2, replacing

Special tools and equipment

VW402 thrust plate
VW408A punch
Press sleeve for 2080A sleeve
Item 1 Kukko 21/4 extractor
Item 3 Kukko 22/1 support
VAG1416 hot air blower
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39-70

Removing

- Remove center differential page 39
-56
.

Note:

The upper part of the illustration shows how the pulling hooks of extractor
-B- must be inserted into needle bearing -1-.
- Slide centering sleeve -2- of extractor -B- approx. 4 mm in direction of
arrow in order to be able to open pulling hooks of extractor far enough.
A - Support e.g. Kukko 22/1
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39-71


WARNING!
Wear protective gloves! - Spread extractor -B- into upper lip of needle bearing -1- and secure
extractor at nut.
- Install retainer -A- on extractor -B- as illustrated.
- Support retainer -A- using VW402 thrust plate and pre-tension at nut 3
of retainer.
- Using commercially available hot air blower, quickly heat up outside of
transfer housing in vicinity of needle bearing seat to approx. 100 C. - Quickly pull out needle bearing.
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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.
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