i heard more of a 'creak' in the video (wonderful exhaust note and acceleration i'm envious). My car makes more of a 'thunk' on initial acceleration or changing from reverse to forward. I've been assuming it's the subframe bushings shot and the subframe is shifting around as I also get a thunk over certain expansion joints etc when under power (e.g. up slight grade, hit a bump, i get a distinct thump in the back). Crazy driveshaft story good feedback for an eventual repair; i'm suspecting my wife's driveshaft or CSB as the cause; sounds a lot like a wheel bearing hum but seems to be under my ass when driving. I do have one wheel bearing i didn't replace yet on her car and plan to replace that soon just to preemptively strike since i've replace 3 of 4 already. I get a constant subtle humm with her car that doesn't change with power on/off (as if differential) no change in neutral, but I had obvious vibration that went away when i changed the front left wheel bearing. (there was more, louder humm also but the hum got quieter and vibration in the steering wheel went away when i changed the front left bearing). now with a constant but quieter hum that i can't pin on a corner, i'm suspecting drive shaft or CSB any feedback on the similarity of if the CSB itself fails will i get a similar sound? i'm thinking i might be starting to feel a minor vibration as well.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)