Max, I know for a FACT that the AX4N and AX4S are not compatible, although it's juts the electronics that keep it from working. I switched one here from a donor car, and was fortunate to have the computer that I could swap into it. Everything else bolted up the same! Same year, same engine, everything else the same on the car. I'm pretty sure the Taurus version is the same as the windstar version, as long as they're the same trans model, S or N. I have rebuilt a few of them, but I really don't like to rebuild that one. The ford and GM front wheel drives suxxxxx...