Front end Hum noise

[shiznit]

I got a 2001 4x4 with a front end hum. I replaced the driver side wheel bearing thinking this was the problem and sure enough it wasnt. I recently drained the transfer case and that wasnt the problem. I start hearing the hum after 20-25 mph and gets louder the faster I go. Anything else I can check?

TIA, Steve

 

[Fordf100]

I have that same noise and I'm in the process of working on it I've been hearing a lot about the front and rear tires having two different dimensions from wear, what fluid did you use in the transfer case I've heard to use ATF-fluid

 

[Bigbill]

Try the other bearing or it's in the differential assembly