Why is my 95 Mercury villager making a LOUD noise when I put in gear?

What is your question?

It never gave any warning. I started it, put it in Drive, it made an awful noise. At which, it kept making til I put it in park til I shut it off. It does it in reverse too. It was pulling. Now it's not. Help me please. I didn't notice any fluid leaking.

How long has your 1995 Mercury Villager had this problem?

It happened a week ago. I can't drive it. This happened all of the sudden. No warnings.