WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.
-- Check the torque converter hub -arrow- for wear grooves.
Fig 1: Checking Converter Hub For Wear Grooves
Courtesy of AUDI OF AMERICA, LLC
NOTE:
The torque converter must be replaced if it is damaged or faulty.