engine AUDI A8 1998 D2 / 1.G 01V Transmission Drive Shaft Service Workshop Manual

39-79

Driveshaft, removing and installing


Special tools and equipment

Removing
Repair Manual, Engine Mechanical, Repair Group 26; removing and
installing exhaust system
Repair Manual, Engine Mechanical, Repair Group 26; removing and
installing exhaust system
3405 alignment fixture
- Observe important notes page 39
-73
- Remove crossmember below exhaust system if installed.
- Remove front exhaust pipes:- Remove rear part of exhaust system starting at clamp to gain access to
the driveshaft:
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Repair Manual, Engine Mechanical, Repair Group 26; removing and
installing exhaust system If a new driveshaft is installed and the factory color marking on the
rear final drive flange is no longer visible, check radial run out at
flange/driveshaft page 39
-86
and adjust color marking at driveshaft
to new marking at flange.
After disconnecting driveshaft from rear final drive, an additional
balance washer (thick washer) that may be located between shim and
bolt head may not be reinstalled. Replace driveshaft bolts (self-locking).
- Adjust driveshaft after installing page 39
-88
.
- Install exhaust system free of stress:
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39-86

Radial play at driveshaft flange,
measuring and marking


Special tools and equipment

VW387 dial gauge holder

2024A Engine SlingDial gage Bolt M10 x 85
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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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39-88

Driveshaft, adjusting


Special tools and equipment

Adjustments must be made very carefully as a poorly adjusted driveshaft
is usually the cause of vibrations and humming noises.
Repair Manual, Engine Mechanical, Repair Group 26; removing and
installing exhaust system
3405 alignment fixture
- Observe notes page 39
-73
.
- Remove crossmember below exhaust system if installed.
- Remove rear part of exhaust system starting at clamp to gain access to
the driveshaft: - Remove heat shields above driveshaft.
- Release mounting bolts for center support slightly.
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Installation is reverse of removal, noting the
following:

- Install exhaust system free of stress:

Repair Manual, Engine Mechanical, Repair
Group 26; removing and installing exhaust
system
Tightening torques

Component
Nm
Center driveshaft support to body 23
Crossmember to body 25
Nuts for clamping sleeve 40
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