Originally Posted by BigBadBob

My 07 Eddie Bauer Expedition 4x4 is slipping at low speeds, usually between 20 to 40 mph. I'm not even sure if "slipping" is using the right terminology, but it feels sort of like the tranmission jerks a few times, then corrects itself and it's smooth driving after this. During this jerking period, it feels as if the engine will stall. Although it rarely happens when I hit highway speeds, such as 60 mph or higher, it has jerked going at high speeds as well. The engine does have a little over 80,000 miles, but other that this annoying jerking, my Expedition runs as good as the day I bought it. I haven't had any other major issues. I change the oil every 5,000 miles using full synthetic oil. Anyone have suggestions as to what is causing this?