Why do trucks have so many transmission gears?
In: 354
Because they need to. They are carrying much more weight than a car is carrying.
When the truck is empty, often the lowest few gears can be skipped plus in the rest of the shift sequence you might be able to upshift 2 gears at a time. With a full load, the truck needs all of those gears to start moving as well as to reach the highest gear.
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