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Almost everyone must be missing the point here. I will simplify.
An electric motor has most of its torque right from the start, with hardly any reason to change speed. However, depending on tire rotational speed versus the top speed of the motor, there may need to be some sort of speed matching technology (a transmission) to keep things running efficiently. Changing tire rpm versus motor speed appears to signify a need for a go-between technology. Further, starting from a stop is better handled by a lower gear, especially if one is using a lower-powered motor and a heavier vehicle. Another factor involved in vehicle power is that even a tractor trailer might not use much power once it is moving.
So the obvious question is about bolting an electric motor directly to an existing transmission, and in particular, an automatic. And also obviously, what happens when one does so.
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