Give the General Windstar information sticky post a read.
I would change the Transmission fluid and filter, I have pictures that show the DIY process starting here....
http://rides.webshots.com/photo/1503...11220610kYSGCI
Use a Mercon V rated fluid......takes about 13-15 quarts to completely flush the system.
I would also replace the power steering fluid....again, use Mercon V rated ATF.
You might consider installing a Magnefine filter on the low pressure hose that comes from the cooler (pipe in front of the radiator) to filter out any particles.
You are also due for a cooling system flush.....I think your year uses G-05 coolant.....you could check your manual......some FORDs still used "traditional green" in 2002.
The G-05 has a pale yellow color.
I would use one of those 2 types......not a "silicate free" "all makes and models" or "Dexcool" coolant.
I like to take mine in to my trusted shop for a "safety inspection" once a year.
Otherwise, a proper alignment includes a good shakedown of the front end.