Loud noise the faster the vehicle goes the louder it gets

Could you make a recording of the noise and post it on here? That would be helpful. How about if you drive down the road, at a steady speed where you hear the noise, then shift into neutral but keep the engine rpm's the same? Now do the same test but let the engine drop to an idle. What does the sound do now? Next drive it and manually shift it from low gear up to drive, keep the vehicle at close to the same speeds if possible. What does the noise do then? What type of tires does it have on it and are they wearing evenly? Does the sound change if you drive on pavement or dirt or concrete? This should help isolate if the noise is from the transmission, engine or driveline.

Okay, with the sound staying the same regardless of the surface it isn't tires which are a common noise problem these days. Maybe hearing it would help if possible.

If possible upload a video or audio recording to the site? Hearing it would help. Your description sounds like a fan clutch issue but you replaced that. Try the tests I posted earlier and post the results, the speed vs engine rpm would help narrow down if it's engine or transmission, but normally a transmission issue is going to be there regardless of temperature. Likewise something like a brake or U-Joint would be there all the time. Because it takes some speed to make it act up it could be something strange like air blowing through a loose panel or around the windshield.
Do you have someone who could ride with you for a test trip? Have them move from seat to seat while it makes the noise and see where it is loudest. The engine is stock? Factory air box? Does the sound change if you are turning the steering wheel?Does the sound change if you are on the throttle and let off or does it slowly build up then down with speed only?

Okay, I would try this test, with a cold engine, remove the drive belt. Check all of the parts the belt runs on, idlers, tensioner and accessories. Normally an accessory would make noise all the time but I've seen some where they don't do much until they were under load. Now start the engine and see if anything has changed. "And yes the more I push on the throttle the louder it gets just like the faster I go same thing" Do you mean you can get it to make the noise without the vehicle moving or does it have to be moving?

Okay, if it has to be moving and warm that sort of points to something in the drive-line, like an internal bearing or ring and pinion. If you have a set of jack stands or a lift you could put it in the air enough to allow you to run it in gear and see if you can pinpoint it that way. Another option is a tool called a chassis ear. Essentially it is a set of microphones you clip to various points and listen for the noise, then move them around to narrow it down.
Or have someone ride with you and listen. Sound travels real well though so it can be hard to track from inside the vehicle.
Didn't see your video, may not be in a format the site can use.

Don't give up yet. It might be something expensive or it could be something that just hasn't been found. Noises are always difficult to track down unless they are real obvious. Once tracked down a weird howl on a car to a bent piece of metal that would catch the air sometimes and sound like a very loud moan.
Here is another odd test, find a nice straight road and shift it into and out of 4WD a few times while it is noisy, see if that changes anything.
Maybe try posting your video again. If it won't load here you could try Facebook or YouTube and see if it goes up there, then just post a link to it.

I doubt it's the hubs as those will normally make different sounds as you steer, that is why I asked about the different speeds and noise changes. Shifting into 4X4 should eliminate it being the transfer case, the front axle and the CV joints as well as the hubs. Take a look at the air intake tube and air-box, look for cracks or splits.