[Kurt in NJ]

It depended on the load and the road when I was driving the 46 1.5 ton truck— and how much noise I wanted to make.
Climbing a hill with a 2 ton load I would wind each gear out until it wouldn’t pull hard.
My father would check the fuel mileage and yell at me if it was under 18 mpg ( yes it would do that with a 2 ton load if I kept it under 65.)
There was a chart on the speedometer for each gear but the speedometer ended at 60