So I am working on an RS6 trans and it has a dent on the pan.
http://audipages.com/tozo/tn_IMG_3648.JPG
the Allen wrench in the drain plug supposed to be parallel with the pan.
http://audipages.com/tozo/dented%20pan.JPG
It had the correct filter,
http://audipages.com/tozo/19mm%20filter%20pipe.JPG
but with the dent it got close to the bottom of the pan. You can see the debris ring created by the filter pickup pipe.
http://audipages.com/tozo/tn_IMG_3645.JPG
So cutting the pickup pipe shorter could be a life saver.