mitchalvin

Unless you have an external cooler the most likely candidates are the power steering lines or transmission cooler lines. The cooler lines are usually hardlines while the power steering uses flexible lines. In my experience the flexible lines will start leaking first unless you are missing some clamps for the hardlines.

dewman

On my 96 F150, the transmission cooler lines are hard lines, but they connect to the cooler with rubber lines. If the lines dry rot, or the clamps loosen, then they can leak fluid.