Audi A8 Workshop Manual page 174

Audi A6 2005 ➤ , Audi A8 2003 ➤
Servicing automatic gearbox 09E, four-wheel drive - Edition 12.2011
Checking axial and radial clearance of planetary gears
– Check axial clearance of planetary gears -arrows A-.
• Wear limit (axial clearance): 0.4 mm
– Check planetary gears for radial clearance -arrow B-.
• The planetary gears must not have any noticeable radial clear‐
ance.
– Check shafts for planetary gears.
• Shafts must be properly secured (check peening)
• Make sure area around shafts has no blue discolouration.
– Renew planet carrier „II" and „III" if necessary.
Checking running surfaces of output shaft for wear
– Check running surfaces on inside and outside of output shaft
-arrows- for wear.
• The running surfaces should not have any deep scoring and/
or blue discoloration.
If there are deep scores and/or blue discolouring:
– Renew output shaft.
Proceed as follows if the running surfaces have no blue discolor‐
ation and there is only slight scoring:
– Rub down running surface one or two times with abrasive pa‐
per and oil (grain size 600).
– Clean running surface thoroughly with clean cloth and check
running surface.
• The running surfaces should now be in as-new condition.
If scoring is still present after this step:
– Renew output shaft.
170
Rep. gr.39 - Final drive - front differential
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