I've been without a vehicle this week. I went to the library and store last week and noticed a burning smell. Naturally I kept sniffing, hoping it was something I was just passing. When I pulled into the library, it was obvious - it was MY truck. White smoke was coming from under the hood. I lifted the hood and started checking fluids. No transmission fluid - at all.
Luckily I was two doors down from an auto parts store. I hoofed it over there and bought some fluid. I just got enough to limp home on.