I have a new '07 V6 Highlander that exhibits a driveline vibration right around 1800 - 2000 RPM. It's not pronounced but it is annoying especially since that RPM is where the engine is at when holding about
60 MPH in overdrive. However, it is not speed dependent since it also does it when holding that RPM in lower gears at a lower speed. It's almost like a resonance that I can feel through the gas pedal and steering wheel. It is definitely NOT the tires. Anyone else ever notice this? I am very surprised that considering this is the same engine as the Lexus ES330, it is not as smooth or as quiet.