Mine is at the dealer right now waiting on a new CVT, this is the second one. I had a new CVT in November, 2013. It shuddered after two weeks, then many times after. I mentioned it to the dealer all the time, but didn't really push the issue since there wasn't any real fix yet. I started to push the issue in the last few months and Nissan didn't want to replace my CVT, but put in the latest program it just made last month, which seemed to help so far. However, I wasn't going to take that, and after a few conversations, Nissan sent a specialist to take a look. He said that Nissan did not see any damage in any of the CVT it received back from customers. We agreed to pull the CVT oil pan to look at the oil. We did see metal flakes and shavings, so he agreed to replace my CVT. I suggest if you have had a few shudders, even if it was fixed with programs, new torque converter, or just stopped on its own completely, fight to get a new CVT or at least get the CVT fluid flush and look at.