Table of contents: Removal ↓ Installation ↓
Removal
If present, unscrew the four bolts and remove the cross member located under the exhaust pipes.
Unscrew the nuts securing the exhaust pipe connecting clamps, disconnect and remove the rear section of the exhaust system.
Unscrew the bolts and remove the heat shield located above the propeller shaft.
Fig. 11–1. Cardan shaft and reverse main gear: 1 – main reverse gear; 2 – gasket; 3 – constant velocity joint; 4 – fixing plate; 5 – self-locking bolt, 55 Nm; 6 - universal joint; 7 – adjusting gasket; 8 – bolt, 23 Nm; 9 – intermediate support of the cardan shaft; 10 – cardan shaft; 11 – self-locking bolt, 55 Nm; 12 – fixing plate; 13 – constant velocity joint; 14 – gasket; 15 – gearbox
Fig. 11–2. Location of propeller shaft tunnel mounting bolts
Unscrew the bolts and remove the tunnel (Fig. 11–2).
Fig. 11–3. Location of alignment marks and bolts for fastening the propeller shaft to the flange of the main rear gear
Check if there are alignment marks on the propeller shaft and the main rear gear flange (Fig. 11-3). If there are no marks, apply them.
Loosen the bolts securing the propeller shaft flanges to the gearbox and final drive flanges (see Fig. 11–3).
Loosen the bolts securing the intermediate support of the propeller shaft.
Install and secure the 3139 driveshaft deflection retaining device on the driveshaft.
Completely unscrew the bolts securing the propeller shaft flanges to the gearbox and final drive flanges, as well as the propeller shaft intermediate support.
Move the cardan shaft joints along the shaft splines and remove the cardan shaft from the vehicle.
Remove tool 3119 from the propeller shaft.
Installation
Installation is carried out in the reverse order of removal, taking into account the following.
Clean the threads for the crankshaft mounting bolts in the gearbox and final drive flanges.
Check that there is no grease on the flanges of the driveshaft. Remove the protective film from the new sealing gaskets and install the gaskets on the flanges with the sticky side facing the driveshaft.
To avoid imbalance, align the marks on the propeller shaft flange with the marks on the gearbox and final drive flanges (see Fig. 11–3).
Note: The maximum deflection angle of the constant velocity joint axis is 8°, and of the universal joint – 25°.
Secure the driveshaft with new bolts.
Adjust the position of the intermediate support of the propeller shaft.
Check that the exhaust system is free and does not touch the body.
[Material republished from the website «AudiManual.ru»]