torque AUDI A8 1998 D2 / 1.G 01V Transmission Drive Pinion And Ring Gear Adjust Workshop Manual

39-176



3253 wheel bearing assembly set with 3253/3
and 3253/4
3304 retainer
Engine/transmission jack VAG1383A
engine/gearbox jack
Dial gauge extension 30 mm
Dial gage
Torque gauge 0 - 600 Ncm
Pa
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pinion and rin
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39-177

Drive pinion, adjusting


Notes:

Before adjusting drive pinion, adjust ring gear
(determine total shim thickness "S" total" for
adjustment shims "S1" + "S2") page 39
-186
.

Drive pinion only has to be adjusted again if
gear set, tapered roller bearings for drive pinion
or final drive housing was replaced. Adjustment
overview page 39
-170
.

Do not grease new tapered roller bearings
additionally for friction torque measurement.
The bearings are already greased with a
special oil from the factory.

Determining Shim "S3"
(adjust preload of tapered roller bearing for drive
pinion)

- Clamp final drive into engine and transmission
assembly stand page 39
-123
.

Note: - Pull large tapered roller bearing outer race into housing.
Pa
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pinion and rin
g gear, ad
justin
g
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39-178


- Pulling small tapered roller bearing outer race into housing.
- The outer race must be oiled and installed using VW408A punch and
30-205 thrust pad.

WARNING!
Wear protective gloves!
Notes: - Install drive pinion without spacer sleeve.
-
Heat up small tapered roller bearing inner race to approx. 100 C and
position on drive pinion.
Do not grease new tapered roller bearings additionally for friction
torque measurement. The bearings are already greased with a special
oil from the factory. Only install spacer sleeve if friction torque has been adjusted (Shim
S3 already determined).
Pa
ge 15 of 38 Drive
pinion and rin
g gear, ad
justin
g
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39-179


- Install 3304 retainer using two hex bolts M8 x 30.
- When tightening nut, support final drive (e.g. using VAG1359/2
universal mount with VAG1383A transmission hoist).
- Always replace drive pinion nut.
- Tighten nut for drive pinion until no more drive pinion backlash is
present.
- Increase tightening torque further until specified friction torque is
attained; while tightening measure friction torque multiple times.

1) have been run in at least 50 km A - Standard torque gauge, 0 to 600 Ncm
B - Extension with 32 mm wrench socket
- Adjust to following friction torqueNew bearings
Run-in bearings
1)
200 to 250 Ncm 30 to 60 Ncm
Pa
ge 16 of 38 Drive
pinion and rin
g gear, ad
justin
g
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39-184

- Remove drive pinion and large tapered roller
bearing outer race and install together with
determined adjustment shim "S3" and spacer
sleeve Page 39
-159
onward.

- Insert small tapered roller bearing inner race and
tighten nut for drive pinion until specified friction
torque is attained Fig. 11
, page 39
-164
.

Notes:

Do not grease new tapered roller bearings
additionally for friction torque measurement.
The bearings are already greased with a
special oil from the factory.
Increase torque slowly and measure friction
torque multiple times. If the specified friction
torque is surpassed, replace spacer sleeve and
repeat adjustment! Any spacer sleeve that has
been pressed together too far one time must be
replaced.

- Adjust friction torque to following values:
New bearings
Run-in bearings
1)
200 to 250 Ncm 30 to 60 Ncm

Pa
ge 21 of 38 Drive
pinion and rin
g gear, ad
justin
g
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39-186

Ring gear, adjusting

(Adjusting differential)
Procedures after which the ring gear must be
adjusted Adjustment overview page 39
-
170
.

Notes:

Tapered roller bearings for differential are low-
friction bearings. Therefore friction torque can
only be used for check measurement in a
limited way. A correct adjustment is only
possible by determining the total thickness
"Sges".
Do not grease new tapered roller bearings
additionally for friction torque measurement.
The bearings are already greased with a
special oil from the factory.

Total shim thickness "Stotal" for adjustment
shims "S1" + "S2", determining
(adjust preload of tapered roller bearing for
differential)
Drive pinion removed or ring gear detached
from differential housing
Pa
ge 24 of 38 Drive
pinion and rin
g gear, ad
justin
g
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39-191

Measuring friction torque (check
measurement)

Drive pinion removed
Differential installed with shims "S1*" and
"S2*"

Friction torque specified values: 1) have been run in at least 50 km
Notes: - Position torque gauge 0 to 600 Ncm -A- on differential.
- Read friction torque.New bearings
Run-in bearings
1)
150 to 300 Ncm 30 to 60 Ncm
Tapered roller bearings for differential are low-friction bearings.
Therefore friction torque can only be used for check measurement in a
limited way. A correct adjustment is only possible by determining the
total thickness "Sges". Do not grease new tapered roller bearings additionally for friction
torque measurement. The bearings are already greased with a special
oil from the factory. For a new adjustment of the gear set, the drive pinion adjustment
Pa
ge 30 of 38 Drive
pinion and rin
g gear, ad
justin
g
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