Seattle King County Metro 2003 New Flyer D40LF

[@brianbrwa]

As to why its so loud, Metro's coaches have a special DPF that focuses on capturing more of the pollutants. As a side effect, they don't muffle the engine quite as well. If this is a fairly recent recording, they also have Canadian M+S tires, so they have a resonant frequency that sounds like really bad tire howl. Also, the seats are vinyl, so there are fewer surfaces to absorb interior noise.

[@kennysbusdrawings]

The voith transmissions make that noise

[@brianbrwa]

@@kennysbusdrawings This is in addition to the Voith whine (Also, the MAN axle makes an additional whine).

[@busrailfan]

@WMATAvids - Yeah that Voith sounds so sweet! GREAT VIDEO!

[@WMATAvids]

WOOO Do you here the damn voith in that shit!! Outstanding!

[@billlmf]

King County Metro purchased these D40LF in 2003, not 2007~~

[@MetroLinerXLZ]

@Nabinut Niether. Just needed to turn off the engine fans.

[@milesfann33]

I think they got rid of these now didn't they? Isn't Seattle's whole fleet mostly hybrids and trolleys now?