A straight shaft into the transmission is possible. But the motor has rubber mounts so the motor can move up to an inch in any direction. The bearings would have to be attached to the motor and would move with it instead of the chassis where they would bind when the motor moved. It would be possible to just mount the straight shaft bearings to the transmission and move the electric motor to it also. That would isolate the entire thing from vibration and still eliminate the stresses on the transmission bearings
More stuff to think about