One problem related to ball joint has been reported for the 1997 Ford Thunderbird. The most recently reported issues are listed below.
My mechanic has informed me of a dangerous situation with my automobile that could lead to an accident. All the ball joints in the front end are worn excessively. He says the excessive wear is a result of the dust seals disintegrating allowing dirt and water to enter the ball joints. He indicated that this is probably a result of the use of inappropriate or defective materials for the seals. I am going to have the ball joints replaced. I will ask the mechanic to keep the old parts for me.