Hi Dave,

Regarding your statements below:

"If it's acting up while coasting in neutral and not touching the brakes then most likely it's driveshaft related."

I meant braking while in neutral, no issues coasting in neutral without braking.

"If you sense it's coming more from the front then either the forward universal joint or the driveshaft centre support (carrier) bearing would be my initial suspects."

Definitely I sense this from the front at the brakes level, meaning the vibration is in that area.

This is an entirely new area of work for me. Everything related to the transmission and propeller shaft is just as it was when I bought the car from the dealer 28 years ago—no one has ever touched that part of the vehicle, and if they had, it would have been me. :)

Speaking of disc warping, would that be possible such a behavior out of the blue? Also, a warped disc would start to vibrate immediately as I hit the brakes, and not at the end of braking.

I found this video from this guy who describes what appears the same identical problem, start watching at minute 6:58 and this is what is happening to me:

https://www.youtube.com/watch?v=gRVtiRd7yVw

Thanks,
Alex