Front Wheel Bearings

Even if you put the truck in neutral, the front and rear driveshafts will still turn, so you can't really rule out the drivetrain. But I doubt it is the drivetrain. I would bet it is the tires. All tires will get noisy after time. Are these the original tires? 68,000 miles would seem like enough mileage for the tires to start showing signs of wear, like road noise. If you are going to get new tires, consider the Cross Terrains.

The tires only have 20,000 miles on them, although they are half worn (here in the up and down hills of Pittsburgh that's about average).

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Sorry I misread your original post. I thought you had 68,000 miles on the tires, but that's the overall mileage of the truck. 20,000 miles on a set of tires seems young, although it's still possibe they can cause noise.

I had noise from my 2000 Explorer 2WD that I thought might be bearings. It was caused by the tires-they were 'cupping'.

don't forget the rear differential and rear wheel bearings, both known explorer/mountaineer issues

I took it to my Ford dealer today. He says it's a front bearing and the rear springs are broken.

I took it to my Ford dealer today. He says it's a front bearing and the rear springs are broken.

I took it to my dealer who said it needs new rear springs (both broken) and passenger side front bearings.

FWIW, this crap is not mine

F*** God , all of them

Ah, that's a new trick from the ever innovative spammers. The spam bot copies a subject and a complete sender's information, then appends the spam to an existing thread. It's all over usenet now. Unless something is quickly done, this will be the end of usenet. Sad.