ok, whats the deal with overdrive?
as some of you already know, I have my full motorcycle liscence, but am still a "L" when it comes to cars. Well, I got a truck now and I have my road test on wednesday (wish me luck). I'm just wondering what's the deal with overdrive? It says here in my little booky that i should use it when I'm going over 40km/h to save gas. I can feel a difference when I use it, but I'm just wondering is someone could enlighten me with what is really happening.