Pfffttt... Pfffttt... Pfffttt... Flutter Poll

[MJR]

I, too, have this issue. It occurs between 25-30+ mph and is felt as a vibration or "buffeting" in the front seat and arm rest. There is no sound with mine, it is only a sensation.

I have a 2020 3.8 AWD G80 with less than a 1000 miles. It has done this since the beginning. I'll have it looked at in the next week or two.

 

[TinsleyC]

Yea...5.0 here and have that issue. Do not waste money on a shaft, a lot of people have reported it comes back.

The rubber coupler that joins the shafts is suspect, when the car is parked, it's hot and can be slightly twisted. Then on a following cool morning, it's cooled and in an uneven state. That can cause the vibration as the car is driven, the rubber is hard and heats up and get back into shape. This (IMO) is why the flutter / vibration goes away after a few miles.

I have the '19 G80 and I've never had / felt this. But, I park my car on a flat driveway, garage is insulated so it never drops below 55 or above 85 in the dead of my Texas summer.

This was arcman's original discovery and it makes sense to me.