Question-got a noise!

[Off-roadRanger04]

My buddy drives a 2000 Explorer 4dr XLS 4x4, we were drivin around yesterday and when it hit 20mph or above you hear a whining noise coming from the front end...its not engine because its not consistant with RPMs only the speed of the vehicle...any help would be nice.

 

[Glen4X4]

Is the noise still there whether or not your on the accelerator? Do you know how many miles are on it?

 

[Off-roadRanger04]

72k plus...well i dont know but you cant hear it with the noise of the engine...once he lets off to glide you hear it, it kinda sounds like turbine engine on a plane or like a supercharger just not as fast.

 

[Vinniety]

Front Hub bearing. Do a search for hub bearing and you will read a lot about whinning noise related to hub bearings.

That is what i would state it is.

 

[Walnut777]

On my 96 explorer mine makes a very loud humming sound and it sounds like it comes from the air filter housing. It only does it every once in a blue moon when it very hot outside. But it can be heard while sitting in park with the truck running.