I own a 2009 CTS AWD and the transmission was replaced under warranty but now I get a light load shudder. I have been told it may be a torque converter issue. It is most noticeable when on cruise and then you travel up an incline. The car shudders and then goes away. If you didn't know any better you would think there are speed grooves/bumps in the road. The Dealer has tried to fix it many times with no success. Now the Dealer says it is a characteristic of the AWD and that their stock cars all perform the same. Anyone else have this problem? Better yet anyone with a fix?