sounds like the head is cracked.
If the antifreeze is leaking out the exhust system, I.E. you are experiancing white smoke, you either have a leaking head gasket or a warped head. I can't see any other areas where there would be antifreeze at the rear end of any explorer model.
Blown head gasket.
Its a strong indication of a blown head gasket
A head gasket is leaking or the Head is cracked.
It depends on if you see the antifreeze leaking or it is just disappearing. If it is just disappearing then a bad head gasket or cracked head may be the problem. The smoking could actually be vaporized antifreeze. If that is the case don't run it until you can get it fixed.
cracked water jacket in the head
Head gasket could be bad
you might have a blown head gasket and the coolant is leaking into the cylender and the engine is burning it.
You may have blown a head gasket, check you oil to see if the antifreeze is leaking into there.
It is possible. However, it will be a temporary fix.
If losing anti freeze but not visible leaking typically means bad head gasket. Antifreeze is leaking into combustion cylinder and therefore evaporating and going out exhaust pipe as steam.
If it is leaking from a bad head gasket, it is because of a bad head gasket. If it is leaking from a bad intake manifold gasket, it is because of a bad intake manifold gasket.