Additional ATF filter
Note. Rules of cleanliness for working on automatic transmissions --> Rules for cleanliness when working on transmission . General repair notes --> Repair instructions . Always blow compressed air through ATF cooler and ATF lines (max. 10 mbar) and replace auxiliary ATF filter before installing a replacement transmission. If extremely dirty ATF flows out when blowing with compressed air, ATF cooler and ATF lines must also be flushed with clean ATF. To install, first insert ATF lines into transmission or cooler by hand as far as they will go, then bolt on.