Humming noise front diff or wheel bearing?

Got a first gen Tacoma been having a humming noise coming from front of the truck hate to think it’s the front differential but I’m starting to get convinced I feel a vibration in the floor and it’s most noticeable at 35-50 mph after that it dies down. Any thoughts?

 

There is no play in the bearings

 

Most likely wheel bearings. Try to find a smooth steady paved portion of road, and while you hear the noise turn the steering wheel left and right. This puts a side load on your wheel bearings. If your noise goes away, changes tones, or gets worse while turning, it’s most likely a wheel bearing.
If there is no change in the noise at all, shift into 4x4 and listen for a change in sound. If you have an ADD differential in the front, the spider gears are spinning in the front differential while it’s in 2wd, shift to 4x4 and the spider gears stop spinning, and the ring and pinion start spinning.
It could also be tire noise, they normally change tones dramatically when going from smooth asphalt to rough asphalt, but that all depends on what tires you’re running. If you’re running MT’s you can expect road noise. Look for abnormal tire wear.
Those are all the things that come to my mind, without any more information.

 

Check your carrier bearing or u-joints as the speed you stated is indicative of those items going bad.
I thought my left side wheel bearing was bad, turns out it was my right side.
Noise plays tricks with you with vehicles.

 

I would rotate my tires first and see if that changes anything. Also check front and rear diff fluid.