1999 Ford Taurus Wagon 130000 miles

You need to do a thorough inspection of the front end. For starters how old are the struts. Were they ever change. Looking at the old tires to see how they worn could help in finding a front end problem. Do you still have them your remember how they looked? Next any worn front end componet could cause shimmy, shake or vibration. You have eliminated the most common causes (tires and rotors) you need to look at the front end now. Good luck