Odd noise coming from under my 2001 X5

[computergui]

So sometimes when driving, when accelerating, I get a noise from under the car that almost sounds like running over 3 or 4 rumble strips. It's pretty reproducible. If I'm in Manual mode, it generally happens between 3rd and 4th gear if I get on the engine a bit. If I speed up a little more slowly I can avoid the noise.

Driveshaft bearing?

This is a 2001 X5 with the 8 cylinder engine.

Anybody have something like this happen???