I recently just purchased my 2012 focus automatic and been having the same issues. It had 24000 miles when i purchased it and now has 28000 miles its still within warranty for only another 2000 miles. Im taking it to my dealership today with the horrible shuddering from a complete stop to the grinding going into second and now gear slippage. Ive had it for about 2 months at the time when i test drove it, there was a slight shudder felt more like it was just sluggish from a start and the dealer then told me to wait a week and see how it feels. Well after about 3 weeks it finally stopped and i had a nice smooth ride well, that lasted for about a week, now ive been dealing with the above mentioned shuddering and other issues for nearly a month now and the dealer said they will look into this afternoon im certainly hoping they can resolve my issue with this because i really dont want to keep driving and having these same issues.