I have a 2005 Mountaineer that will hesitate (hiccup) while traveling on the highway between 1000 and 2000 rpm's. I took it to the dealership and they said that the coil, plugs wires and transmission fluid all needed changed. I was at about 58000 miles when it began. I have had everything changed but the coil and the problem persists. It just seems like the ford dealership is replacing parts until eventually they find the problem. Seems like a waste of my time and money. I can replace parts myself with no labor charge. I half wonder if it is a transmission problem and not electrical. I do have a Ford extra care extended warranty with about 15000 miles left but it doesn't cover things like plugs and wires but it does cover the tranny. Any ideas?