I brought my 2014 Stingray (with A6) in for service. At about 70K miles it has developed what feels like a shudder or misfire at highway cruising speeds, occurring several times per hour. After 2 days at the dealership (and using their diagnostics), they determined this new development, which was never previously present, is “normal”, and produced a TSB to substantiate their position. Everything I have read or heard points to torque converter. Their price for TC replacement is 3K. This is an evident issue in newer models, identified elsewhere in this forum. Of course, my confidence is low in their ability to conduct the repair. They have no other resolution for the issue.