ATF lines and ATF cooler, cleaning

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.

Special tools, testers and auxiliary items required

Fig 1: Identifying Drip Tray V.A.G 1306

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Drip tray VAG1306
Hose, approx. 18 mm
Compressed air gun, standard
Protective glasses

NOTE:

Always blow compressed air through oil cooler and ATF lines (max. 10 mbar) before installing a replacement transmission.
When installing ATF lines, insert into transmission or cooler by hand until impact first and then tighten bolts.

CAUTION: Wear protective glasses.

Place drip tray VAG1306 underneath.

Fig 2: Location Of ATF Lines At Transmission

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - 2 -.
Disconnect ATF lines from transmission.
Slide a hose with approx. 18 mm diameter onto ATF line - A - and secure with hose clamp. Place the other end of the hose into an appropriate container.
Blow through ATF line - B - with compressed air gun.

Change hose from ATF line - A - to ATF line - B - and repeat procedure.
Replace O-ring - 1 -.
Coat O-ring with ATF.
Insert ATF lines completely into transmission by hand until stop.

Re-secure ATF lines.
Then check ATF level and top off → ATF level, checking onward.