I've got a 2001 S80. I live in a pretty hilly area that has up to 12% grades and puts a pretty big load on brakes. My owner's manual seems to endorse engine braking and maybe I shouldn't worry about pulling the gear lever into 3 or even 2 to take a load off the wheel brakes but I can't help but wonder if I'm putting a lot of stress and strain into my transmission and cooling system. In other words should I resist the temptation to gear down and just let my wheel brakes do the job? I don't need speculation. I can do that myself. Anybody actually have some real information to kick in here? TIA Pat