An update on this issue. Took the vehicle and left it overnight at the dealer. They waited for me to come back the next day so the vehicle would be stone cold and I could show the tech the noise. After four seconds at startup it made the noise. We went in and the tech looked up applicable TSBs. Found one that was close (had to do with shifting into park and drive). The TSB was for trans build dates up to 15 days before mine was built. (called for the valve body or separator plate to be replaced). The tech emailed Ford and they advised him to replace the valve body and a trans temp sensor. Thought they may be vibrating on engine start up. If that doesn't work them some work on the trans front pump may be needed. (pull the trans out and do the work). May get it back tomorrow if the valve body is available and works. Will update once we get it back.