Yes - the axles are replaceable.
See "Related Questions" below for more detail on getting started
Try a 30mm socket.
Axle "beam" - could be the rear, or a front 1/2 axle.Hopefully it's the front because that's a whole lot easier.See "Related Questions" below for more about getting started with replacing a front axle
YES , the Ford Windstar is a front wheel drive vehicle
yes
Windstar mini-vans are front wheel drive.
Tighten front axle wheel hub retaining nut to 157-212 ft. lbs
EITHER 30MILLIMETER 32 OR 36 MILLIMETER I 'vote' for the 30mm - Ford seems to use that size often (Sable/Taurus have 'em too)
If you have verified the vibration is coming from the axle, then it needs to be replaced. It's not really a bad repair job - even for us backyard mechanics. Vibrations can also come from a bad tire (split belts), or worn suspension parts. See "Related Questions" below for more
221 ft/lbs
That means either the Front or rear bulb is not working and needs to be replaced.
I paid $490 to have the water pump replaced.
One of the front tires has a broken belt in it. Take it to your tire shop and they can find the tire that needs replaced.