 4.2L engine with electronic throttle body.  No good.  When you break into a corner, and then accelerate out the response time was generally 3 seconds.  A member of my gun section worked at dealership told me that Ford is aware of the problem, yet has no new "strategies" for the computer, and had been given no indication as to when fix would come.  Transmission was in 4 times in 2 months: 1-2 gear "strategies" reprogrammed, 1-2 gear valve body replaced, milky tranny fluid additive added, 2-3 gear valve body replaced, along with 1-2 valve body again.  Went lemon law, was offered a collateral exchange, got a '05 Freestar w/3.9L engine.  The van was 100% better than the Explorer.