(14 Dec 2016, 11:48 pm)BusLoverMum wrote I can ignore any B9 upper deck noise because it's a reprieve from the grunt grunt grunt grunt grunt grunt engine noise on the lower deck. The grunting is at a frequency that I find quite painful to listen to. I even only manage the X1 with deep breaths to get me through it.Not all B9TLs on the TEN have the so aptly described noise - though most of them do.
(6073 was the quiet one today.)
I wonder what has deteriorated to induce this grunting noise, as I don't recall it being a feature when they were new.