yup your dreaming the factory warranty is still 36,000. I bought an extended warranty at 28,000 so i am covered to 75,000. If i still have it at around 73k i will extend it again if possible. To answer your question nope, your warranty is gone if you have even a quarter of a mile over 36k.
How ever i do have good news for you, if your talking about your engine and trans it looks like you might have a 60k warranty. What is wrong with your ex?
Click this link to the ford website and scroll to the bottom.
http://www.fordvehicles.com/suvs/Explorer/compare/details/?vehicles=21816|21955|23618