Under load the car shudders and moans. When you lift off the gas it goes away. It doesn't matter if it's in the city or on the highway. I searched the internet for the same complaint and found several people with the same problem. There was a TSB for the CVT transmission on the 2013's to fix the problem, but when I went to the dealer, they said it didn't apply to the 2014 model year.... (even though the problem seemed to be the same). Service said, just keep complaining every time you come in, so it would go on the record and that hopefully there would be a TSB for the 2014's eventually. Also, it runs rough when idling at a light. I test drove the model before buying and it never had these problems. It makes the car feel very cheap. I'm a commuter and it's very annoying. It's my first and my last Nissan. I just recently read that Nissan was ranked in the bottom 3 for quality issues amongst all the automaker's in the world..... Too late for me, but hopefully, this will discourage others from buying a Nissan....