^ In 1984, cars barely had enough power to pull their own @ss in Overdrive, much less a trailer. This like other subjects is, well, very subjective. There's nothing magical about overdriven vs direct vs under driven save for the fact that the taller the overall ratio, the harder it is to pull it. It is not "so simple". There are many variables that someone who thinks it's so simple are likely not aware of. I'm not just speaking about 700R4s in clapped out 30 year old trucks either.