2004 Ford Taurus 6cycler new battery would start , New drive traine belt put on , some thing locked up broke belt changed it ?
Check the pulleys and tensioners, A family member with the sable had this problem too. It was the big tensioner cost a bunch about $140 I think.
that $140 may have been belt and labor too I did not do the work for them they were on the road and had a shop do it,
Looking for a Used Taurus in your area?
CarGurus has 294 nationwide Taurus listings starting at $4,988.
Search Ford Taurus Questions
Ford Taurus Experts