I took the GT to my Ford Dealer and had the Tach checked out. The technician is a friend who provided some idea and also called Ford Engineering on the issue.
He tells me the tach needs to be replaced:ack He goes to the parts counter and get a quote at retail: $2700 (part only) :eek their cost $1900. He as the service manager calling Ford to get some relief on the cost. My GT has 7,700 miles and the tach goes up!!!!!!!!!!! I have never had a tach go up on any car in my life.
I told the tech I would contact the service mgr to discuss but any thought ideas? Any used tachs available??