trans fluid survey

I put in some kind of gear oil the first time I filled a tranny, But I find that all the 4 speed and manual 3 speeds that I have taken out, have ATF in them. So that is what I put in my 4 spd this time. Don't know about the cold climate part of it, I have had a 4 speed for years, and they always seem fine hot or cold.

I live in Vancouver BC

Phil