Volkster

Well my '17 6.2 8-speed just had it's first "shutter" at 21,700 miles. As the rest of you, it felt like going over the double yellow line rumble strips when at low load, low rpm. The torque converter wouldn't stay locked up and the rpm's would vary up and down. Just got it back from dealer. They also performed the TSB where they just flush and refill tranny with an "updated" synthetic transmission fluid. I was also told to give it 200 miles and if it happened again most likely they would do another flush and fill. They showed me the TSB where it stated that as of recently they will not change out torque converters anymore as it's not the problem and a permanent fix is coming in early 2019. So far the problem is gone but apparently it will show it's ugly head again after reading this thread so I hope it makes it until the permanent fix comes out.