I just picked up my 17 from being at the service dept for the 4th time. I'm at 24k miles. Last 3 times it was there they updated to the latest software and did a trans relearn to help with the clunk, hard shifting, and shudder. This time they flushed the trans and updated the software again. Honestly it drives so much better than it ever has now. We'll see how long it lasts but I'm happy with it finally. Is it perfect? No, but it doesn't bother me anymore. If the shudder and clunk come back I'm going with a blackbear tune. Sent from my SM-G950U using Tapatalk