I own a 2010 Ford Fusion - 2.5L 6 spd auto. Purchased Sept 21, 2010. Current mileage is 10,xxx miles. Trans started to slip, bang gears, wouldn't upshift - most probs at full throttle, but started doing this at part throttle too. Been in the air at the dealer for three weeks and found today that the fix is a new valve body that is currently awaiting engineering approval (per FoMoCo Cust Serv). New, redesigned part won't arrive until late April. FoMoCo is offering a warranty extension to ease my concern. I made it very clear I expect this to drive better than new. FWIW, the trans was sluggish to shift between P, D, R.
If Ford is redesigning the valve body, this wasn't a bad batch. There are alot of failing Fusions out there.