Originally Posted by 2kg4u
There are no tire pressure sensors in the wheels. Low pressure is detected by the wheel speed sensors which are in the hubs.
X2 - Also...does the vibration happen at 60mph when you put the car into neutral?
If you've ruled the tires and wheels out, then you need to concentrate on body mounting hardware, the engine, the transmission flywheel and the torque converter, the transmission output shaft, the propeller shaft, the rotors and the hubs.