Rules of cleanliness for working on automatic transmissions

WARNING: This page is about a different car, the 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Thoroughly clean all connections and the surrounding area before disconnecting.
Place parts that have been removed on a clean surface and cover. Use foils and paper. Use lint-free cloths only!
Carefully cover over opened components or seal, if repairs are not carried out immediately.
Only install clean components: Only unpack replacement parts immediately prior to installation.

Always replace O-rings, gaskets and sealing rings.
Lightly lubricate O-rings before installing, this prevents the rings from being pinched when inserting.
Use only ATF in areas near ATF. Other lubricating substances cause functional problems in the hydraulic transmission control.
Check the following fluid levels after installing, top off if necessary. ATF in planetary gear → ATF level, checking , gear oil in front final drive → Gear oil in front final drive, checking , gear oil in center differential → Gear oil in center differential, checking and topping off . Capacities and specifications → Capacity onward.