I have a 2008 Mustang GT which seems to have the exact issue that is described by Ford TSB 09-09-06.
TSB can be viewed here : http://www.stangpit.com/wp-content/images/docs/s197-tsb/09-09-06.pdf
Basically my transmission exhibits a harsh grind during the 2-3 shift if the transmission is cold. It will go away after about 5 minutes of driving (warms up) or if I shift very slowly from 2nd to 3rd. I have verified that I am clutching in all the way. My question is that I have a power-train warranty valid until December of 2013 from buying the vehicle as certified used through a Ford dealership. The TSB says that the service is eligible under new vehicle limited warranty coverage. What does that mean? Will this service be covered?
If the service is covered will it be worth doing? I honestly don't really trust dealerships that much to begin with. Could letting them rip apart and replace the synchros in my transmission just make things worse? I don't plan on driving the vehicle in cold weather too much anymore but I also don't want the situation to get worse overtime.