Audi A8 - ATF Supply Unit

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3.9 ATF supply unit
3 - Needle bearing
❑ Perform visual check for
damage: needle bear‐
ing should be in as-new
condition; renew if nec‐
essary
5 - ATF pump housing
❑ Check running surfaces
for scoring and signs of
abnormal wear
⇒ page 178
6 - Annulus
❑ Check running surfaces
for scoring and signs of
abnormal wear
⇒ page 178
❑ Check drive lugs in
pump gear ⇒ page 179
7 - ATF pump gear
❑ Check running surfaces
for scoring and signs of
abnormal wear
⇒ page 178
13 - Stator shaft
❑ Check brass bushes for
wear ⇒ page 179
❑ Check splines for wear
❑ Component part of ATF
supply unit; cannot be
renewed separately
15 - Rectangular section seals
❑ Checking for wear
⇒ page 179
Checking components of ATF pump for scoring and signs of wear
– Check running surfaces of following components for scoring
and signs of wear:
2 - ATF pump housing
3 - Annulus
4 - ATF pump gear
• The running surfaces should have either a dull or bright finish
and should be free of even the slightest trace of scoring.
Note
♦ Very slight scoring can be smoothed down with an oilstone.
♦ A defective ATF pump causes delays in power transmission
and gear changes.
Audi A6 2005 ➤ , Audi A8 2003 ➤
Servicing automatic gearbox 09E, four-wheel drive - Edition 12.2011
178 Rep. gr.39 - Final drive - front differential