Howling noise

[carrollcy]

howling noise
I've got a question about my 04 4runner...I live in Osan AB, Korea and you guys are really great source to get all the information for my 4 runner. there's a howling sort of WOO-WOO-WOO sound coming from the rear side (could be front) when I am driving at 30-50 mph but no noise in higher speed it started abouth two weeks ago. I've got new Michellin Cross terrain tire yesterday but I am still hearing the noise, I have about 72,000 miles on it and it is 4.0 V6.

Any ideas??
Thank you very much
Cliff

 

[josh220]

And you had the noise with the tires that you had before the Michellin Cross terrains?

 

[carrollcy]

And you had the noise with the tires that you had before the Michellin Cross terrains?

I had Dunlop tires before and I thought tire was causing the noise that's why I replaced with Michellin Cross terrains but the noise is still there.

Thank you.

 

[josh220]

Well first you need to isolate whether it's the front or the rear, before we can really give you our opinions on what it could be.

 

[greasefingers]

That is a common sound when a differential goes bad.

First I would check the gear oil in there. The level in there should be about 1 cm below the fill hole.

 

[carrollcy]

Well first you need to isolate whether it's the front or the rear, before we can really give you our opinions on what it could be.

I drove it again and it is coming from rear.

Thank you.