97 impreza Humming noises

[Herc04]

Lately, there has been a loud humming noise coming from the rear of my 97 impreza when I drive . I know its not the exhaust. It has about 73,000 miles on it with the orginal tires i think. My bro says it might be the rear differential thats making the noise. Any ideas? Thanks.

 

[Ned Pike]

In

Lately, there has been a loud humming noise coming from the rear of my 97 impreza when I drive . I know its not the exhaust. It has about 73,000 miles on it with the orginal tires i think. My bro says it might be the rear differential thats making the noise. Any ideas?
Thanks.

Wheel bearings

 

[Edward Hayes]

My tires (Michelin Xones) developed a noticeable humming noise after the tread wore down to 5/32 or 1/2 original. Talked to tire man who looked at tires and WE saw a slightly schoped (spelling) on all the tires. Tire man said this is the result of rotating the tires in the same direction always and not following Michelins and other major manufacture rotation recommendation. The correct rotation for most manufactures and Machine(awd cars) is:back tires to front and front tires cross to rear which we did. Noise almost disappeared after about 1,000 miles and rotating again. ed