WARNING: This page is about a different car, the 2017 Volkswagen Touareg, 2016 Volkswagen Touareg, and 2015 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
-- Check the converter hub for scoring -arrow-.
Fig 1: Checking Converter Hub For Wear Grooves
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
The torque converter is welded and must be replaced if it is damaged.