Humming from rear axle (video)

[vdynmx]

Two times now I have driven my car pretty hard and after a while when I drive home it starts to humm / buzz below the rear passenger seat / axle. So the noise happens while driving or stopped. The only time it seems to go away is under medium or hard acceleration. What could this be, from my search it could be fuel pump or diff ? Let me know what you think, appreciate it! https://www.youtube.com/watch?v=RLzfE0k1FZA

[rcsoundn1]

is the sound speed sensitive? (vid wont load because I am at work.) If it happens when you are stopped it not your dif, because when you are stopped nothing in the Dif is moving.

[vdynmx]

rear axle noise

is the sound speed sensitive? (vid wont load because I am at work.) If it happens when you are stopped it not your dif, because when you are stopped nothing in the Dif is moving.

Its speed independent. Noise when stopped.

[ST1G]

[efficient]

Sounds like your fuel pump is on its way out

[redsubdivisions]

Change that fuel pump now before you have to do it in a parking lot like I did lol

[ST1G]

It's either the fuel pump or you have an air compressor in the trunk.

[crappycoco]

Yep, thats a fuel pump on its way out.