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Here's what I don't get: Why do you need to shift gears at all?
Seriously - the rated speed with this motor is 10,500 rpm. Along with the stock 6.86:1 gear ratio and average sized tires, my calcs (and others) indicate that this is good for 115 mph. Now, 50kW may not be enough for that speed, but this is a power issue, not a transmission issue.
This is why I'm going for a two motor system initially. If spec'd with the correct battery, the car can easily handle normal driving conditions. Accelleration is reasonable, at about 8 or 9 seconds 0-60.
Would this be improved with a transmission? Not according to Tesla, who built the first Roadsters with 2 speed transmissions. Because of reliablity issues, they simplified to a single speed gearbox and re-tuning the motor.
I'm totally into the idea of a custom gearbox, similar to the MGR - just one that's a bit better suited for EV use.
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