keith

I have a 2019 fusion platinum hybrid 40k miles. I was driving from Seattle to Arizona. My wife. Son and myself. All of us together is about 500lbs plus a full trunk The car would start making a harmonic sound that vibrated through the body going up steep inclines. I don't recall anything else happening. But the sound wow it was annoyingly loud. Anybody have a idea? Is this car toying with our lives?