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, since they have already documented the shudder as “normal”. They have no other resolution for the issue.

I’m trying to figure out who knows less about the A6 transmission, GM or the dealer. Just got off the phone with the GM regional rep, who told me the torque converter was not covered under the power train warranty, according to her warranty documents. I politely explained to her, attempting to overcome my astonishment, that the torque converter was the interface between the engine and transmission, and that it certainly was a component of the the power train. It devolved from there. Next nearest Chevy dealer with high volume Corvette business is 3 hours away.

Mtn View Chevrolet asked me to bring the car back after I spoke with the Chevrolet Service Rep. For “a second look”. They have determined they will replace the Torque Converter. Hopefully operating it in the meantime has not damaged the transmission. Still will pursue compensation for what they charged me on the initial visit (because they couldn’t find anything wrong) where they alternately determined it was the tires (their transmission specialist), or it was normal (shop foreman).

I was texted on Monday 8/13/18 and advised of the decision to replace the TC, and the part was being ordered. On Wednesday 8/15/18 I was texted and advised the TC had been replaced, the car had been road tested, and was ready for delivery. Michelin AS3+ tires being put on this evening, then a road test at speed.

​​I had reported a TC replacement at about 79K Miles in my 2014 C7. This is just a follow up. After a “break-in” period, everything seems to have settled down, and all is much improved. Now if I could just get my arms around the intermittent overheating issue...

Driven at highway speeds, then bumper to bumper traffic, due to construction/ accidents, etc. Although, in town after a short trip it started overheating out of nowhere...