Water leak were motor and transmission meet
No water at that junction. It must be coming from somewhere else and running down to that point. could be a simple fix or something major like a blown head gasket. Any other symptoms? How quickly is it draining?
It's could be an intake gasket on the back of the head, or a freeze plug in the head, I have even seen head gaskets leak and run back and down. Pressurize the cooling system and get a mechanics mirror and start looking.
Looking for a Used F-150 in your area?
CarGurus has 209,129 nationwide F-150 listings starting at $1,200.
Search Ford F-150 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford F-150 Experts