 In 2011 I bought a Ford Fiesta - within a few weeks after it started jerking and shuddering on acceleration. Long story short - after 3 repairs I was going to have it declared a lemon. The dealership  wanted to put me in a Ford Focus and give me a good "deal" after all my headaches. I bought the 2012 Focus and started having the same issues - shaking, jerking and shuddering. The transmission control was replaced last year and now having the same issues. Took the car in and they said they need to replace the transmission control unit again but it will be 12-16 weeks before the part comes in because there is a huge waiting list - duh. Fix it right the first time. I am done with Ford. 