My '03 Ls180 has a very loud engine--so loud including the gear whine from the pumps that New Holland gave me $13,000 off on a new one and paid off my '03 (read: I threatened to sue, and that was their peace offering). The decibel meter showed 85-95 dB. OSHA only allows an 8-hour time-weighted exposure of 80dB. Ironically, the '05 is even louder--100-110 dB which is up there with a jet engine so I'm told. My dealer was not happy when he asked me if I was happy with the sound levels and I told him what I found (we both have sound meters). Now he isn't so inquisitive. All in all I'm happy with my '05 Ls185.b 2-speed. Big and strong--like my women...errr...skid steers. Yeah, that's it: skid steers. My New Holland TC33D tractor is also loud for a 33p diesel. It's the same engine, except the turbo, used on the Ls170.