Hotsauce55

I can clearly hear the difference between just barely having my foot on gas (no noise) & when I take foot off a humming sound starts. Is this a common problem?

First guesses are driveshaft play or maybe drive axles. I read something about a flex disc but have no idea what it is. This noise is rather annoying.

2005 E55

Hotsauce55

Thinking pinion bearings are a possibility too

Hotsauce55

Had a better listen last night, sounds like it's coming from the transmission tunnel. Around 60-70 mph is the loudest when decelerating if speeds go low I can't hear it much at all & above 70 mph it seems to get quieter.

Only thoughts now coming to mind is carrier bearing or something internal in the transmission