Hello I'm Chris a Ford Employee and Certified Engine/Transmission Specialist.
Thanks for asking your question. I am eager to get your vehicle back up and running correct, I am here to help you out for a small fee far less than a dealership and easier on the wallet, so if this information is of aid PLEASE PRESS ACCEPT and help me out financially by paying the small fee (which you selected). Please reply if further discussion is needed.
Yes they are. Since they gave you the wrong trans it should be covered as far as the replacement.
In 97 they used this transmission.
They did not offer the 4.2 in 98. And in 99 and up the trans part # XXXXX so I cant say if there 99 is a direct fit replacement. I would match up the tag from tyour old trans to your new one.