sounds like your talking about the seqential transmission type set up.
Engine wont crank over if you cant get it out of gear.
Sounds as if your hydraulic pump isn't working.
The guys at Ford will will sell you a pump for about $6000 but from my experience it is really rare for a pump to fail.
Best way to confirm this is by doing a computer scan if you are showing a code HPU pressure loss that means the electric motor has failed.
You can't buy the electric motor only the $6000 assembly.
However if you need one I can rebuild a motor for you and send it out to you with fitting instructions.
Will cost you $1300.
Takes me about 45min to remove and replace.