 Just read the elderly gentlemans review from march and felt compelled to respond. I'm one week in owning a 2015 Focus SE Hatch. This is my second Focus. Had a 2012 that I traded in on the current one. Here's what was explained to me about the transmission by service and sales;it's actually a manual transmission that has 2 clutches. The chattering sensation is the clutches engaging against the flywheel and is normal. If you've ever driven a manual pedal clutch car not all but most make a similar chatter. Now when I say chatter this is very subtle and I test drove two 2015's and they both did it. My 2012 also did it and had 76,000 on trade with no tranny problems. 