620S Drive Shaft Rumble

[JP_Spencer]

I was wondering if anyone had experienced a 'rumbling' coming from their drive shaft when at low speed (e.g., 30-40 MPH) in mid to high gear (e.g., third to fourth)? I've been aware of it from the start. 

I recently purchased a 620S and I've noticed a rumbling (e.g., low vibration) coming from the drive tunnel under those conditions. The car recently had its first service at Silverstone and nothing was uncovered there. Is his normal behavior for the 620s?  Any advice appreciated. 

[ScottR400D]

Sure it's not the diff chatter that most of us suffer? Does it stop if you lift off fully or open the throttle? 

[JP_Spencer]

Ah, yes it does. Problem understood. Many thanks Scott. 

[ScottR400D]

It very common, it's the C and P chattering and the reasons I've heard for it include propshaft alignment, due to engine being tilted forward (v unlikely IMO) and the excitement of the C and P from the firing pulses not being damped by the lightened flywheel. (Much more plausible, IMO)

Whatever, most do it and it doesn't seem to result in much harm. I find it easy to avoid by keeping the revs up a little and avoiding rolling along with a v light throttle. If it starts, drop a gear or lift off all the way. 

[JP_Spencer]

Thanks Scott, I'll try that.