AUDI A4 1998 B5 / 1.G 01V Transmission Center Differential Service Workshop Manual

39-45


Center differential, servicing Transmission installed
Special tools and equipment

VW401 thrust plate
VW412 punch
VW402 thrust plate
VW454 thrust tube
VW407 punch
3021 protractor
Pa
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39-46


WARNING!
Do not run engine with the center differential
removed or without gear oil and do not tow
vehicle.
Notes:
The parts listed in the following illustration can be
removed with the transmission installed.
4020 press tube
3118 press support
Item 3 Kukko 17/2 separating tool
Rules of cleanliness for working on automatic
transmissions page 37
-148
.
General repair notes page 00
-27
.
Pa
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39-47


1 -
Socket head bolt - 25 Nm
2 -
Rear drive flange
3 -
Seal
Always replace page 39
-61
4 -
Bolt - 23 Nm
4x
5 -
Housing cover
6 -
O-ring Coat with transmission fluid
7 -
Snap ring
8 -
Grooved ball bearing For spur gear 1Pressing off Fig. 1
, page 39
-54
Pressing on Fig. 2
, page 39
-54Pa
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39-48


9 -
Spur gear 1
For rear gear setIf damaged, only replace together with spur
gear 2 -Item 17 - Always replace To remove and install, pull out of center
differential housing toward rear together
with -item 7 - and -item 8 -
10 -
Snap ring
11 -
Needle bearing For spur gear 1Only remove for replacementTo insert, heat up transfer gear housing to
approx. 100 C and drive out needle
bearing toward rear using drift (Warning!
Wear protective gloves) Drive in to stop using 3021 protractor
Pa
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39-49


12 -
Bolt - 23 Nm
Loosen or tighten in stages and in diagonal
sequence
13 -
Center differential housing
14 -
Tension nut For rear drive flange -Item no. 2 -
15 -
Needle bearing For spur gear 2Only remove for replacementAlways replace page 39
-69
16 -
Snap ring
17 -
Spur gear 2
For rear gear setIf damaged, only replace together with spur
gear 1 -item 9 - To remove and install, remove center
differential housing page 39
-56
and pull
out together with -item 18 , 19 , 23 - Pa
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39-50


18 -
Grooved ball bearing
For spur gear 2Pressing off Fig. 3
, page 39
-55
Pressing on Fig. 4
, page 39
-55
19 -
Snap ring
For securing grooved ball bearing -item 18
- in center differential housing
20 -
Washer For grooved ball bearing -item 18 -Before installing, clip on guide plate -item
21 -
21 -
Alignment plate
22 -
Bolt 10 Nm
23 -
Snap ring For securing grooved ball bearing -item 18
- on spur gear 2 - item 17 -
Pa
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39-51


24 -
Gasket
Always replace page 39
-56
25 -
Torsen differential
If damaged replace as complete unitRemoving and installing page 39
-56
26 -
Seal
Always replace page 39
-65
27 -
Magnet
Removing and installing page 39
-56
28 -
Bushing
2x
29 -
Breather For transfer gearWith cap installedInstallation position: Without cover,
breather must project 10 to 11 mm out of
housing
Pa
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39-52


30 -
Bolt - 23 Nm
Observe tightening sequence page 39
-
27

31 -
Intermediate flange for front final drive
32 -
Gasket
Always replace page 39
-24
33 -
Bushing
34 -
Drive pinion
For front final driveRemoving and installing page 39
-67
35 -
Intermediate pinion
For front final driveInstallation position: gear identification
faces toward transfer gear
Pa
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39-53


36 -
Output pinion
For front final driveInstallation position: gear identification
faces toward transfer gear
37 -
Seal Always replace page 39
-67
Pa
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39-54


Fig. 1 Press off grooved ball bearing for spur gear 1
A - Separating device 22-115 mm, e.g. Kukko 17/2 separating tool

Fig. 2 Press on grooved ball bearing for spur gear 1
Pa
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