Bad Needle Bearing?

https://youtu.be/6X1E3LxnrD0?si=2cbs3FWcNcDmQPgY
Hey guys need some advice on a problem that’s came up - having a loud hum/vibration starting at 30 mph and gets worse the faster I go and can feel through floorboard. Thoughts are u-joints, wheel bearing, or needle bearing.
I’ve jacked truck up and did the wheel bearing test and found the wheels to have no play in them. I will admit I’ve lacked greasing u joints for a while now (dumb mistake) so that could be a possibility for u joints. Earlier today I got under truck and tugged on driver cv axle (video attached) and noticed quite a bit of play compared to passenger one.
Taking the truck into shop tomorrow to get a diagnosis aside from what I’ve already done to see if I can get an answer before just replacing parts that don’t need done. Thought I’d ask up here beforehand though. TIA guys.

 

Does it go away when you engage 4WD?

If yes = needle bearing

 

Tried this test very hard to tell honestly.

 

It might not be the needle bearing then, it should be somewhat decisive when you switch to 4x4. However, it looks like there's a lot of play in the cv, I can't really tell. Some play is normal. But I might recommend pulling the cv so you can look at the needle bearing. And if you're going to the trouble, you should just install the ECGS bushing, because removing the cv is the hardest part of that job. Might not be the problem, but this way it won't become a problem in the future. It is not expensive to do yourself, even if you have to buy the overpriced tool. And it is not a waste of money, even if this isn't your problem.

Bad wheel bearings tend to make more or less noise when you are turning to one side or the other, like following bends on the highway. They do wear out, so if the noise changes when turning right vs left on the highway, I would replace both. I had a bad bearing and it never felt loose when I jiggled the wheels on jackstands. So this is not a good test. However, the noise wasn't really that loud, so it would have to be really bad for the noise to be loud.

If you have lots of miles, it is not a bad idea to have a driveline shop replace your u joints and carrier bearing, as preventative maintenance. They will also repaint and rebalance it. You can do most of this yourself, but I think it's worth it to have a shop do this, because it's a bit tricky and you can't balance the shaft at home. Again, this might not be your problem, but if you have high mileage, it is not a waste of money.

A really loud noise might also be something in the gears. An easy first step would be draining the gear oil to see if it's full of metal, or if the oil is low, or contaminated with water. I'm talking about the rear axle.

 

ECGS bushing

 

I had a hum/vibration [from under the drivers side floor boards] at specific speeds and only when cold - when I switched to 4WD the difference was immediate and noticeable, noise gone.

I would second @mk5 - when I switched it into 4WD the noise very clearly disappeared