My car expertise up to now has been oil changes and brake changes.
For about the last two months there has been a dull drone coming from the rear of my 2015 Subaru Forester that just hit 100,000 miles. The drone does not get significantly louder with an increase in speed and does not get better or worse if the car is turning left or right.
The tires have been changed on the vehicle and the drone has remained unchanged on both sets of tires.
Today I had jacked up both rear wheels and found that when I attempted to spin them, they BOTH made a grinding noise as they spun. There was zero play in either wheel and both rotors have visible rusting on their outer edges.
I am far from an expert in fixing cars and am looking for your opinions.
Is it possible that both bearings are bad despite there being no play in either wheel?
Could my rotors be causing a noise that mimicks that of a bad bearing?
Are there any other potential causes for this that I am not considering?
Thank you very much for your time and assistance!