AUDI A4 1998 B5 / 1.G 01A Transmission Final Driveshaft Service Workshop Manual

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Driveshaft, servicing

CAUTION!

Refer to general repair instructions Page 00
-14
.

Do not bend the driveshaft more than 25 at
the center universal joint, otherwise the
universal joint could be damaged.

Only store and transport the driveshaft
extended.
No repair work can be carried out on the
driveshaft with the exception of removing,
installing and adjusting.
If the driveshaft is only detached at the
transmission or from the rear final drive, it
must be tied up or supported at the constant
velocity joints.
Before removing, mark the position of the joint to flange. Reinstall in the same position
otherwise imbalance will be excessive, the
mountings could be damaged causing
rumbling noises.

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For complaints (noise or vibrations), first
check whether correct adjustment of the
driveshaft resolves the problem before
replacing the driveshaft.
After removing the driveshaft from the rear
final drive, do not reinstall additional balance
disc (thicker washer) which may have been
installed between base plate and bolt head.
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1 -
Final drive
2 -
Gasket
Always replacePull off backing foil, and attach self-
adhesive side of gasket to drive flange. De-grease drive flange
3 -
Constant Velocity (CV) joint Maximum permissible bend angle 8
4 -
Backing plate
5 -
Socket-head bolt
Always replaceSelf-locking55 Nm (41 ft lb)Bolt threads in drive flanges must always
be cleaned (e.g. with thread tap)
6 -
Universal joint Max permissible bend angle 25
7 -
Shim
Determining thickness Page 39
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8 -
Hex bolt
23 Nm (17 ft lb)
9 -
Driveshaft center bearing
10 -
14Driveshaft Adjusting Page 39
-79
11 -
16Socket-head bolt
Always replaceSelf-locking55 Nm (41 ft lb)Bolt threads in drive flanges must always
be cleaned (e.g. with thread tap)
12 -
Backing plate
13 -
Constant Velocity (CV) joint Max. permissible bend angle 8
14 -
Gasket
Always replacePull off backing foil, and attach self-
adhesive side of gasket to drive flange. De-grease drive flange
15 -
Transmission
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39-71

Driveshaft, removing and installing


Special tools and equipment

3298 alignment fixture for all wheel drive
driveshaft
3139/2 adapter

- Observe all cautions Page 39
-68
.

Removing

- Remove crossmember under exhaust system (if
installed).

- Remove rear section of exhaust system located
rearward of exhaust pipe clamp(s).
Repair Manual, Engine Mechanical, Repair
Group 26
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Removing

- Remove heat shield above driveshaft.

- Remove heat shield for driveshaft from cover of Torsen differential
(arrows).

Note:
Marking the shaft is only necessary if the same driveshaft will be re-
installed. - Check for factory color markings marked on driveshaft and
driveshaft/flange at rear final drive drive flange. If not, mark position of
driveshaft flange (arrow -A-) in relation to drive flange final drive (arrow
-B-) with paint.
- Loosen mounting bolts of both driveshaft flanges.
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39-73

- Remove three upper mounting bolts on each
driveshaft constant velocity joint.

- Loosen mounting bolts of center bearing
slightly.

- Install two 3139/2 adapters, in 3298 alignment fixture.

Note:
Never install alignment fixture onto balance plates. - Mount 3298 alignment fixture with both 3139/2 adapters and tighten
plastic nuts.
- Remove mounting bolts of flanges to transmission and to final drive as
well as mounting bolts for center bearing.
- Push driveshaft together toward final drive. CV joints can be moved
axially.
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- Remove driveshaft at transmission drive flange
using assembly tool.

Note:
Driveshaft must always be kept in extended
position for transportation and storage.

Installing
Installation is the reverse of removal, note the
following:

Notes:

The threaded holes on the drive flange of the
transmission and the final drive should be
cleaned of all locking compound residue after
the driveshaft has been removed. Otherwise
there is a risk of seizing a bolt when tightening
and subsequently break off at the next
disassembly.
Clean by using a thread tap.
Replace seals on drive flanges. Pull off backing
foil, and attach self-adhesive side of gasket to
drive flange. Adhesive bonding surface must be
free of grease.
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Notes continued:

To prevent imbalance, the flanges of the driveshaft (arrow -A-) and of
the final drive (arrow -B-) must be installed so that the factory color
markings (or the markings made during removal) are aligned. If a new driveshaft is being installed and the factory color marking on
the rear final drive flange is no longer visible, the radial deviation at
the flange for the driveshaft must be measured Page 39
-77
and the
color marking on the driveshaft must be aligned with the color marking
on the flange.
After removing the driveshaft from the final drive, additional balance
disc (thicker washer) which may have been installed between base
plate and bolt head may not be re-installed. Always replace self-locking driveshaft bolts.
- After installing, adjust driveshaft Page 39
-79
.
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- Align exhaust system free of stress.
Repair Manual, Engine Mechanical, Repair
Group 26
Tightening torques

Component

Tightening
torque
Driveshaft to transmission 55 Nm (41 ft
lb)
Driveshaft to final drive 55 Nm (41 ft
lb)
Center driveshaft bearing to
body 23 Nm (17 ft
lb)
Heat shield for driveshaft to
transmission
23 Nm (17 ft
lb)
Front cross-piece below
exhaust system to body
25 Nm (18 ft
lb)
Nuts for exhaust pipe clamp 40 Nm (30 ft
lb)
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