Audi Workshop Service and Repair Manuals

Removing and installing self-locking centre differential with gearbox installed Special tools and workshop equipment required

t  Used oil collection and extraction unit -V.A.G 1782- Removing

–  Disconnect exhaust system at clamps -arrows-.   Note t  The flexible pipe connection (de-coupling element) in the front exhaust pipe must not be bent more than 10° - otherwise it can be damaged. t  The illustration shows the exhaust system in conjunction with the 3.0 ltr. V6 petrol engine. –  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.

–  If fitted, unbolt heat shield for propshaft -arrows-.

–  Remove heat shield -1- for exhaust system below selector mechanism -arrows-.

–  Remove bolts -arrows- 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 used oil collection and extraction unit -V.A.G 1782- below gearbox. –  Drain off gear oil.

–  Unscrew bolts -arrows- and carefully detach centre differential housing -A-.   Note The illustration shows only 4 of the 6 securing bolts.

Installing Installation is carried out in reverse sequence; note the following: –  Fit new O-ring -arrow- and lubricate lightly with gear oil.

–  Place small spring -2- and centre differential -3- onto pinion shaft/hollow shaft -1-. –  Insert large spring -4-. –  Then fit centre differential housing -5- onto gearbox cover.

–  Tighten bolts -arrows-. Tightening torque → Item   Note The illustration shows only 4 of the 6 bolts. –  It is important to clean the threaded holes for the propshaft bolts in the gearbox/propshaft flange to remove any remaining locking fluid. The residue can be removed using a tap. –  Fill up with gear oil and check gear oil level → Chapter. –  Bolt propshaft onto gearbox → Rear final drive 01R; Rep. gr.39. –  Install exhaust system so it is free of stress → Engine, mechanics; Rep. gr.26. Tightening torques

Component		Nm
Heat shield for propshaft to centre differential housing		25