vibration-squeek-rumble

ok so I can't figure out what the world my jeeps problem is. When I start to accelerate there is a sort of squeek that sort of rotates. like a rusty wheel. then as I get to speed it's gone but if i'm driving highway speeds and let off the accelerator there is a loud rumble sort of like a big rig when it tries to slow. And there are some vibrations that are new-not the same as death wobble, but still a loud constant vibration as if I were in a plane sitting in the seat right by the engine.
I thought it might be my u joints but they seem fine, and now this squeeking I'm clueless

thanks in advance!

It does sound like u-joints. Which ones did you check?

I checked the rear diff to drive shaft one.

you need to check your front axle u-joints and possibly the unit bearings. It sounds like it might be the axle shaft joints in the front axle. while at it check out your front drive shaft as well.