[dab1950]

Larry and Bill,

Not sure if it's a Ford thing or not, but the technique of opening windows and
turning on the cabin heater to cool the engine is classic symptoms of a failed
fan clutch on the engine. Been there and done that. Some fan clutches are
the old fluid type, some are electronic but they do fail and that means the fan
does not run at engine rpms and therefore does not pull the needed air through
the radiator.
As far as transmission fluid temps, from my research, fluid temps above 180 F
means the fluid is slowly deteriorating. Larry, I suggest you double check to
make sure your Explorer does in fact have an auxiliary transmission cooler
and have the fluid and filter changed at the same time. Your transmission will
be much happier in the long run.

Hope this helps.