Ford Windstar transmissions are notorious for acting up. I suggest you go to the
Center for Auto Safety Website
and do a search for Technical Service Bulletins (TSB's) Recalls and
Other Transmission-Related Postings regarding 'sibling' vehicles.
You may find a 'Campaign' or other Secret Warranty, or even a Recall that deals with your problem.
As a personal note, my 1995 Windstar has been sitting for about nine
months waiting for my Fairy Godmother to appear with the funding
necessary for a new transmission.Images available only to Customers.
Good Luck !
Steve
Counselor /listener/collaborative problem solver. Thanks!