It happens consistently in the 25-35 mph range, if you let off the gas the sound decreases in pitch. When I was on my way home from picking it up I noticed the noise around 50 mph too, that was the first time I heard it at that speed, but 99.9% of our driving is in town, so less than 50 mph.Very helpful! Did yours make the noise constantly or occasionally? Mine seems to do it when under load, moderate to aggressive acceleration or when turning followed by a acceleration….assuming the latter is due to the AWD system engaging and disengaging different wheels.