Humming noise, louder at freeway speed.

[skillz29]

Hello Everyone!
I have a problem with my 98 Explorer. The issue just started happening after reaching its 200K miles. There seems to be a humming noise coming from the engine while driving at freeway speeds (40mph above) especially when accelarating. When I release the gas pedal, the humming noise will go down a bit but still there. It almost sound like pressing the gas pedal when in neutral and revving the engine at high rpm. Other than that, everything seems normal and I do not experience any lack of power. Please Help!

Here's what I've done so far after researching some of the threads.
- Tires are new, so I don't think it is a thread issue.
- IAC Valve has already been cleaned.

Thank you in advance!

 

[Dopler174]

What kind of tires do you have?

 

[skillz29]

I coudn't remember the exact brand, but I believe it's this one.
Continental ContiTrac SUV - P225/70S15.
I don't think it is the tires, because I spent at least 2000-3000 miles after the tires has been on before the noise started happening. I also had it check and was advised that they are in perfort working condition.
I'm hoping I can get this resolve before anything else start happening.

 

[BrooklynBay]

Welcome to this forum! Did you examine the transfer case, wheel bearings, and brakes? Did you rotate the tires?

 

[Dopler174]

Yes, My next question would be wheel bearings, rear end, or tansfer case? What year is your truck, and do you have any idea where the noise is coming from?

 

[whammett89]

I'm having the same issue now on my 2010 Ford explorer 4.0 V6 really wish someone knew what it was or better yet how do I check the transfer case to see if that's what it is

 

[RangerX]

I'm having the same issue now on my 2010 Ford explorer 4.0 V6 really wish someone knew what it was or better yet how do I check the transfer case to see if that's what it is

Welcome to the forum!
your best bet is to repost your question as a new thread, and placed in the section for your 2010 model.
this is a 16 year old thread and about a 1998.