It's a 2wd. I don't generally have much need of 4wd, find that the trade off isn't worth it because 99.9% of the time you don't use it anyway and you have to crawl up in the bed to get tools and stuff and have the harsh ride. That's one of the things I always liked about this crew cab, it's low and I can get stuff out of the bed easy.
I do have an all wheel drive Aerostar for winter driving.