Bad wheel bearing or warped rotor?

[83Explorer!]

I've heard a low rumbling, sounds like from the driver's front wheel, for a while now. It rumbles when I start to drive and then it will quiet down. I also have a sort of pulsing in the front end when I stop. I don't really have shaking in the steering wheel with either situation.

I have not had a chance to actually lift the front end up and test anything, I'm just trying to get an idea of what it could be.
Thanks

 

[dvdswan]

Sounds like both.

 

[83Explorer!]

That's what I was afraid of. Is there anything else that it could be?

So I'd be looking at replacing the rotors, brake pads, and wheel bearings, correct? I wouldn't have to do anything to the calipers unless they looked like they were bad? Also any wheel bearings that don't say 4WD are applicable?

Thanks for the help

 

[Doug Kaye]

all of those are pretty cheap from Rockauto, and not very difficult to replace on a 2wd.
Still on my original calipers from 2004, working fine.

 

[Todd Z]

These trucks LOVE harmonics. Left sounds like right. A sound is NOT a rotor, But normally a bearing or seal. if 4wd could be front dif, axle, axle bearing or wheel bearing. If 2wd rotor bearings, and if 2wd using a stub shaft, then wheel bearing.