Hello, I'm having the exact same issue with the weird pinging noise. You said that they torqued the drive shaft? Could I inquire as to what dealership you had the repair done it? Perhaps I can have my dealership contact them, because they won't fix anything until they hear back from the Ford Engineers (been waiting atleast a month now). They said that this the second fusion they had make this noise (one being another fusion purchased by the local police department). Thanks.