VehiGAZ,

I've noticed that smell too, but only in winter, and I'm wondering if it is the smell of the mag-chloride (or other stuff in the snow that gets kicked up) that they use to de-ice the roads out here in my little corner of Colorado as it burns off of the exhaust. I've done some off-roading before with the TOD engaging and disengaging, but I never noticed that smell. Only on snow.

My TOD might be frying itself too, but that's my two cents.