Because of this variation and the difficulty of providing visual instructions, I strongly recommend consulting a repair manual specific to your vehicle's year, make, model, and transmission type. A repair manual will have diagrams and detailed instructions, preventing potential damage or misdiagnosis. You can find these manuals online or at auto parts stores.
Searching online for "[Your Transmission Type] Transmission Range Sensor Location 2001 Ford Econoline" will likely yield some helpful images as well. But always use a repair manual as the primary source.