Alright, so my 2014 limited flutters rpm only maybe (+-)100-150 after shifting out of 4th gear. Not a whole lot but it's still noticeable around 30-45 miles an hour. Does not do this during acceleration and doesn't seem to do it beyond this speed. I can link to a video if someone wants to see it for a diag. Brought it to a repair shop, they drove it around said they didn't see anything wrong. Ran a test with a computer, and didn't see any stored codes. They gave the car back and didn't charge anything. A former mechanic suggested it may be a transmission issue because it does not idle fluttering. Does anyone know of a solution?