A8 Lim. Driveshaft

Driveshaft


A8 Lim.
Special tools and workshop equipment required Alignhment Fixture-4W Dr.Shaft 3139 Counterhold tool Touareg V10 T10172 and Adapters T10172/5 Engine/Transmission Jack V.A.G 1383 A with Universal Transmission Support V.A.G 1359/2

Removing

Note See notes, refer to Go to article “ Driveshaft Overview ”
A8 Lim.
The driveshaft should only be worked on a two column lift. Separate the exhaust system at the clamping sleeves 1 and 2 .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove both crossbraces A and B .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove rear section of exhaust system C . Refer to Engine Mechanical Rep. Gr. 26 Description and Operation . Remove heat shield arrows .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove the bolts arrows and secure the main catalytic converter to the underbody.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Note Do not bend the decoupling element in the front exhaust pipe more than 10°, otherwise it will get damaged. Remove heat shield A from transmission arrows .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove the rear final drive cover arrows A and B , if equipped.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Check whether there is a marking (colored marking) on driveshaft and at flange/driveshaft at rear final drive arrows A and B .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
If these markings are not present, mark in color the liition of driveshaft flange arrow A to rear final drive arrow B . Attach 3139 with spacers 3139/4 and tighten plastic nuts.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Note Never lay the assembly tool on the balance plates. Remove the bolts arrows for intermediate bearing.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove the bolts connecting the driveshaft to the transmission using the T10172 and T10172/5 .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove driveshaft from transmission and support it using V.A.G 1383 A . Remove the bolts 1 (quantity: 6) from the rear CV joint.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Use the T10172 and T10172/5 . Remove driveshaft. Note Always store and transport a driveshaft fully extended only.

Installing

Installation is in reverse order of removal. Observe the following when doing so:

Remove any old or dried-up high temperature grease from the CV joints and the driveshaft flanges. Fill with the exact same amount of high temperature grease G 052 133 A2 . Clean any locking fluid still inside the threaded holes in the flange shafts for the transmission driveshaft and rear final drive. Use a thread cutter to clean the holes. Otherwise the bolts could break off when being installed. After disconnecting driveshaft from rear final drive, an additional balance washer (thick washer) that may be located between shim and bolt may not be reinstalled. Always replace (self-locking) securing bolts for driveshaft. Note installation liition of driveshaft: Center CV joint is located behind intermediate bearing in direction facing the rear final drive. Make sure that the markings on flange for driveshaft arrow A and for rear final drive arrow B line up.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
If a new driveshaft is installed and the color marking made by the factory on the rear final drive flange is no longer visible, then the radial run-out on the flange/driveshaft must be measured and the color marking on the new driveshaft must be made to match the new marking on the flange/driveshaft. Refer to Go to article “ Radial Run-Out on Flange/Driveshaft, Measuring and Identifying ”
A8 Lim.
.
Replace seals for driveshaft at transmission/rear final drive flange. Remove grease from sealing surfaces and adhere new seals. Attach the driveshaft to the rear final drive and to the transmission with new bolts arrows .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Install the bolts arrows just far enough so that the intermediate bearing can still be moved.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Tighten the driveshaft bolts 1 on the rear final drive 5 Go to article.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Use the T10172 and T10172/5 . Tighten the bolts on the front of the driveshaft to the tightening specification 5 Go to article.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Use the T10172 with the T10172/5 . Remove 3139 .

Align Intermediate Bearing as Follows:

Slightly loosen bolt for intermediate bearing. Slide driveshaft toward front until it stops and mark liition of intermediate bearing on the body arrow A .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Slide driveshaft toward rear until it stops and mark liition of intermediate bearing on the body arrow B . Slide driveshaft toward the right until it stops and mark liition of intermediate bearing on the body arrow 1 . Slide driveshaft toward the left until it stops and mark liition of intermediate bearing on the body arrow 2 . Align driveshaft arrow C and arrow 3 . The intermediate bearing must be centered between markings arrow A and arrow B , and arrow 1 and arrow 2 . Tighten bolts of intermediate bearing to tightening specification 8 Go to article.

Continuation:

Install heat shield above intermediate bearing arrows .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Remove heat shield A arrows .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Install the rear final Seal Installer - Driveshaft Flange cover, if equipped. Tightening specifications arrows A 16 Go to article and arrows B 13 Go to article.
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8
Install and adjust exhaust system free of stress. Refer to Engine Mechanical Rep. Gr. 26 Description and Operation . Install both crossbraces A and B . Refer to Engine Mechanical Rep. Gr. 26 Description and Operation .
Transmission|Rear Final Drive 01R|Rear Final Drive, Differential|Removal and Installation|Audi A8

Tightening Specifications

Component Nm

Driveshaft heat shield to transmission 25