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jyanof, you don't need to use the clutch at all in a ecar, the motor has no practical inertia so their is no need to protect the dog teeth in the gear box with a clutch.
As you have experienced using the clutch can create problems, also don't use the electric motor without any load on it as it can/will turn into a hand grenade without the speed limiter parameter engage (aka with the clutch in or the gearbox in neutral).
The only real reason for the clutch in a ecar is in case of a controller failure event were the controller fails "on", its like a drive train fuse. In this event the motor will hand grenade but that's preferable to an out of control car.
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