Audi Workshop Service and Repair Manuals

Removing and installing cover for self-locking centre differential Special tools and workshop equipment required

t  Drip tray -V.A.G 1306- t  Safety goggles Removing l  Gearbox in vehicle   Caution The engine must not be run and the vehicle must not be towed without gear oil.   Note t  General repair instructions → Chapter. t  Rules for cleanliness when working on the automatic gearbox → Chapter.

Vehicles with 2.0 ltr. TFSI engine or 3.0 ltr. TDI engine   Note The flexible pipe connection (de-coupling element) on the front exhaust pipe must not be bent more than 10° – otherwise it can be damaged. –  Slacken nuts on front clamp -arrows-. –  Push clamp towards rear of vehicle to disconnect exhaust system.

Vehicles with 4.2 ltr. MPI engine:   Note To prevent damage, the flexible couplings in the front exhaust pipes must not be bent further than 10°. –  Disconnect exhaust system at clamps -arrows-. –  Disengage rear section of exhaust system at rubber mountings and remove.   Note A second mechanic is required for removing the rear section of the exhaust system.

–  Unbolt heat shield -A- for propshaft -arrows-. –  Unscrew bolts at gearbox/propshaft flange. –  Slide propshaft together towards rear final drive. The constant velocity joints can be moved axially.

–  Tie propshaft up to side onto heat shield -arrow-.

–  Place drip tray -V.A.G 1306- under the gearbox.   WARNING Wear safety goggles. –  Slacken and remove securing bolts for cover for self-locking centre differential in sequence -6 ... 1-; allow gear oil to drain out.   Note The cover is not equipped with a drain plug; drain gear oil by removing the cover.   Caution Pull the cover for the self-locking centre differential carefully towards the rear off the gearbox. Take care that self-locking centre differential does not drop out of gearbox.

–  Secure self-locking centre differential -B- and baffle plate -A- to prevent them dropping out, or pull them off the output shaft towards the rear.

Installing Installation is carried out in reverse sequence; note the following:   Note Renew O-ring on cover for transfer box. Note the following if the self-locking centre differential -B- and the baffle plate -A- have been removed: –  Clean baffle plate, lubricate with gear oil and insert in gearbox. l  Installation position: tongue on baffle plate should be positioned on the gearbox so that the side lugs are located above opening -B--arrow-.

–  Fit self-locking centre differential -B- onto splines of output shaft (turn slightly at the same time).   Note Check installation position of tongue on baffle plate -arrow- again. –  Check that self-locking centre differential can be turned by hand when it is in position. –  Check whether the tongue -arrow- on the baffle plate is still located properly. –  Place cover onto self-locking centre differential with shaft installed; turn slightly if necessary.

–  Tighten bolts of cover for self-locking centre differential as follows:

Stage	Tightening sequence
I	–  Tighten bolts -1- and -2- to 3 Nm.
II	–  Tighten bolts -1 ... 6- to 23 Nm in the sequence indicated.

–  Install propshaft → Rear final drive 01R; Rep. Gr.39. –  Install exhaust system so it is free of stress → Rep. Gr.26. –  Fill up gear oil in transfer box → Chapter Tightening torques

Component	Nm
Cross member to body	23
Heat shield for drive shaft to gearbox	23