1999 AUDI A6 transmission

39-75

Notes for all driveshafts:

General repair notes page 00
-27
.

Do not bend the driveshaft, maximum
permissible bending angle is 25 . Otherwise
the universal joint may be damaged.

Only store and move driveshaft fully
extended.
No repair work can be performed on the
driveshaft with the exception of removing and
installing and adjustment work.
If the driveshaft is only detached at the
transmission or from rear final drive, it must be
tied up or supported at the constant velocity joints.
Before removing, mark position from joint to
flange. Reinstall in identical position otherwise
imbalance will be too high which could result in
damage to the bearing or in vibration noises.
If there are complaints (noises, vibrations) it is
essential to check whether correct adjustment
of the driveshaft eliminates the symptoms
before the driveshaft is replaced.
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39-78


12 -
Backing plate
13 -
Constant velocity joint
Maximum permissible bending angle 8
14 -
Gasket
Always replaceRemove protective film and attach self-
locking side of gasket to drive flange. Degrease drive flange
15 -
Transmission
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39-82


Note:
Never set alignment fixture on balance plates.
For all driveshafts except for carbon fiber driveshafts: - Carefully tighten plastic nuts -A- and -B-.

Note:
Never set alignment fixture on balance plates.
For all driveshafts, also for carbon fiber driveshafts:
Note:
Only store and move driveshaft fully extended. - Attach 3405 alignment fixture and tighten plastic nuts.
- Remove mounting bolts for flanges to transmission and to rear final
drive as well as mounting bolts of center support.
- Push driveshaft to rear final drive together. The constant velocity joints
can be adjusted axially.
- Guide driveshaft out of transmission flange using assembly tool.
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39-83

Installing
Installation is reverse of removal, noting the
following:

- Observe important notes page 39
-73

Notes:

After removing driveshaft, always remove any
remaining locking fluid from thread holes in the
transmission drive flanges and the rear final
drive. Otherwise there is a possibility that the
new bolts may get jammed when installed and
shear when removed.
Cleaning can be performed with a tap.
Replace gaskets on drive flanges (remove
protective film and attach gasket to drive
flanges). Adhesive surface must be free of
grease.

To prevent imbalance, driveshaft flanges -A- and rear final drive
flanges -B- must be installed so that the factory color markings or
markings which were made afterward are aligned (arrows).
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39-85

Tightening torques

Component
Nm
Driveshaft to transmission
(Output flange) 55
Driveshaft to final drive
(Input flange) 55
Center driveshaft support to body 23
Heat shield for driveshaft to transmission 23
Crossmember to body 25
Nuts for clamping sleeve 40
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39-87

Notes:

Always measure radial run-out if torque tube
has been removed. Make new color marking
and remove old color marking.
If a new driveshaft is installed and the color
marking on the drive flange of the rear final
drive is no longer visible, location of largest
radial run-out must be determined and marked
with a color marking.
Align this colored dot with colored dot on
driveshaft page 39
-83
.

Radial run-out can also be measured with the
rear final drive installed, for this the driveshaft
must be disconnected from the rear final drive.
Observe notes page 39
-73
.

- Remove left front bolt at transmission mount for
rear final drive.

- Remove strap from 2024A engine sling and tighten at empty hole using
an M10 x 85 mm -2- bolt. Place 5 M12 nuts -1- under strap.
- Bolt VW387 dial gauge holder to strap in this position.
- Set dial indicator onto ground diameter (arrow) in driveshaft flange and
set to "0" with 1 mm preload.
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11/20/2002 htt
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yp
e=re
pair&id=AUDI.B5.AT01.39.5