oil AUDI A4 1998 B5 / 1.G 01A Transmission Final Drive Gear Set Workshop Manual

39-153

Pinion shaft, adjusting


Notes:

Adjust the ring gear before adjusting the pinion
shaft (determine total shim thickness Stotal for
shims S1 + S2) Page 39
-162
.

The pinion shaft only has to be readjusted if the
final drive gear set (pinion shaft and ring gear),
tapered roller bearings for pinion shaft or the
final drive housing are replaced. List of
adjustments Page 39
-149
.

Do not additionally oil new tapered roller
bearings for the friction torque measurement.
The bearings have already been treated with a
special oil by the manufacturer.

Determine thickness of shim "S3"
Setting preload of tapered roller bearing for
pinion shaft

- Mount rear final drive to repair stand Page 39
-
110
.

Note: - Install large tapered roller bearing outer race into housing without shim.
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39-154


WARNING!
Wear protective gloves. - Install small tapered roller bearing outer race into housing.
- Lubricate outer race with oil and install using VW408A punch and 30-
205 thrust pad.
- Insert pinion shaft without spacer sleeve.

Notes: -
Heat tapered roller bearing inner race to approx. 100 C (212 F) and
install onto pinion shaft.
Do not additionally oil new tapered roller bearings for friction torque
measurement. The bearings have already been treated with a special
oil by the manufacturer. Install spacer sleeve only for final friction torque measurement (after
determining shim S3).
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39-160

- Remove pinion shaft and large tapered roller
bearing outer race and install together with
measured shims S3 and spacer sleeve Page
39
-139
.

- Install small tapered roller bearing inner race
and tighten nut for pinion shaft until specified
friction torque is obtained Page 39
-144, Fig.
11
.

Notes:

Do not additionally oil new tapered roller
bearings for the friction torque measurement.
The bearings have already been treated with a
special oil by the manufacturer.
Increase tightening torque gradually and check
friction torque at regular intervals, if the
specified friction torque is exceeded, the spacer
sleeve must be replaced and the adjustment
repeated. A spacer sleeve that has been over-
compressed at any time cannot be reused.

- Adjust to following friction torques:

New bearings
Used bearings1)
200-250 Ncm (18-22 in.
lb) 30-60 Ncm (3-5 in.
lb)
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39-162

Ring gear, adjusting


Adjusting differential
The ring gear must be adjusted if any of the
components have been replaced table,
Page 39
-149
.

Notes:

Differential tapered roller bearings are low
friction bearings. Therefore the friction torque
only has a limited use as a check. Correct
adjustment is only possible by determining the
total shim thickness Stotal.
Do not additionally oil new tapered roller
bearings for the friction torque measurement.
The bearings have already been treated with a
special oil by the manufacturer.

Determining total shim thickness "Stotal" for
shims S1 + S2
(Setting preload of tapered roller bearing for
differential)
Pinion shaft removed or ring gear removed
from differential housing.

- Pry out drive flange seal using pry bar.
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39-167

Measuring friction torque

Pinion shaft removed
Differential with shims S1* and S2* installed

Friction torque specifications:
Notes: - Install torque gauge, 0-600 Ncm (53 in. lb)-A- onto differential.
- Read value of dial indicator.
New bearings
Used bearings1)
150-300 Ncm (13-27 in. lb) 30-60 Ncm (3-5 in. lb)
1) Must have run at least 50 km (30 miles) Differential tapered roller bearings are low friction bearings. Therefore
the friction torque only has a limited use as a check. Correct
adjustment is only possible by determining the total shim thickness
Stotal. Do not additionally oil new tapered roller bearings for the friction
torque measurement. The bearings have already been treated with a
special oil by the manufacturer. If the final drive gear set (pinion shaft and ring gear) is being re-
adjusted, the adjustment of the pinion shaft should be checked
Page 39
-153
.
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gear set, recommended se
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