HELP!! Noise coming from under car - BMW 320D

[Wg93]

So i have a 2008 BMW 320D and I have taken it to 2 garages. One says my gearbox might have gone, the other says it's my clutch bearing.

There's a noise coming from under the car (possibly under the front drivers seat) - I have a link to it below.

The noise sounds like something is rotating. When I'm in neutral & stationary, the noise is slow and low. The faster I drive, the faster the rotation gets and it gets louder.

While the car is moving, If i change the gear to neutral, the noise goes. As soon as I get back in to gear, it comes again.

Any experts out here that can help me out please?

Please see the link to the video recording the noise - https://www.youtube.com/watch?v=TX4v7ggG-R8

[loose cannon]

YouTube propshaft bearing noise

[littleredrooster]

Wg93 said:

When I'm in neutral & stationary, the noise is slow and low.

loose cannon said:

YouTube propshaft bearing noise

...does not compute... Since when did the propshaft rotate when the car is stationary?

[Mercky]

Gearbox is fked

[shogun001]

Does it make the noise in all gears? And does the noise change with road speed or does changing gear also affect the noise?