Why do trucks have so many transmission gears?
In: 354
trucks are really big and heavy, so they need lots of small gears for getting started and staying at low speed. on level ground with a light load, most trucks start in third gear. that means if they’re *really really* heavy, or if they’re starting uphill, they have the option to start in a lower gear.
now the low end of the gearbox is crowded. so if they stopped at 6 gears like a normal car, they wouldn’t be able to get up to highway speeds.
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