I was thinking about this today. During my College years I drove a yellow short bed Datsun pickup. I think it had a 1800cc motor with like six horsepower. I went to school in the mountains so I was all the time going over Monarch pass in this little loaded down truck.On the big hills We usto laugh about the rubberband breaking . It would only pull 45 mph floored in third (up hill). That little truck took a beating for several years. It was a 2 wheel drive but you could take it anywhere. When it got real cold out it would back up in neutral all by itself. I had to put wood blocks behind the rear tires.