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Why would you need a transmission with an electric motor?
Wouldn't 60 MPH be approximately 8-900 RPM, depending on tire size, and well within the speed range of most motors?
I just looked at a 50KW electric motor that is rated at 180NM (133 FT*LB) torque continuous, more than enough for most applications I would think. Especially if the inefficiency of the transmission and differential are removed.
Sure, unsprung weight is bad for the suspension, and it is going to be sever on the motor, but this effects ride quality more than drive train efficiency.
I would think that the disadvantages can be overcome and some real efficiency gains made, with some appropriate resizing of spindle bearings.
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