2007 Ford Mustang V6 Convertible 100K miles
New Wheels and Tires
I was blaming the old tires and wheels for a vibration felt at 60+ mph mostly through the seats/floor. The new tires/wheels have made no difference to the vibration. It does not seem brake related. When I have rear seat passengers, they notice it. Driveshaft? I see a lot of posts about the GT two-piece drive shaft with carrier bearing, but my understanding is that the V6 does not have this type of driveshaft. What are the...

Vibration diagnosis help please