It is a 2010 AWD V8. 70K miles.
I am hearing a noise while underway. I do not believe it is a engine or tranny noise. I don't think it is a wheel bearing either. I am thinking it has something to do with the AWD. The vehicle runs great.
I can hear it at about 35 mph. It is a constant sound.
Any idea's.

No chamge with vehicle or engine speed?
Any difference turning left or right?

quote:

Originally posted by P250UA5:
No chamge with vehicle or engine speed?
Any difference turning left or right?

Good question. A little louder at highway speed.
Nothing when turning or cornering.

IME, a wheel bearing typically get louder when loaded in a turn, but not always, and the noise tends to follow wheel speed.

Hopefully it's something simple for you

Maybe you can do a drain (suction) and fluid fill on the PTU (looks like a transfer case). This guy says do it every 30k.

https://youtu.be/sS9JPaf1MDg?is=ZnekDnoYOCgwpBve

I had a Mercury Mountaineer and drove it a couple hundred thousand miles and never did that.

I junked it when they wanted more money to change the broken fuel pump than the book value of the car.

Sometimes I am sorry I didn't keep it.

quote:

Originally posted by MRBTX:
Maybe you can do a drain (suction) and fluid fill on the PTU (looks like a transfer case). This guy says do it every 30k.

https://youtu.be/sS9JPaf1MDg?is=ZnekDnoYOCgwpBve

Thanks guys. MRBTX, that is exactly what I was thinking it could be. Thank you for that vid.

$120 for a transfer case serv. at local Ford dealership. Going to try that. Thanks again guys.

I had an Explorer of that era for about 250K. Had very few problems but I did replace wheel bearings more than once.
Fortunately I can do stuff like that myself.
FWIW, they didn't change noise when loaded to the side like they do in many cars.