After an extended high-speed route yesterday my Typhoon started making an "interesting sound". I could only notice it at lower speeds but my guess is that it is there at all speeds. It sounds like a driveline whine (more like a "wooooooooo"). Brakes don't seem to be rubbing and it seems to be speed dependent (as the speed on the truck goes up, the speed of the whine increases... and the volume slightly increases as well). Any thoughts?