Shift-by-wire transmission system

A shift-by-wire transmission system, comprising:

• a gear shifting operation portion provided at an end portion of a body and configured to shift a gear;
• a housing provided inside the body;
• a haptic element provided in contact with the housing and configured to generate a vibration when the gear is shifted to a predetermined gear shifting stage to transmit the vibration to the housing;
• a groove member coupled to the gear shifting operation portion, configured to operate in conjunction with a gear shifting operation of the gear shifting operation portion and transmit the vibration of the haptic element, which is transmitted to the housing, to the gear shifting operation portion;
• and
• a restoration portion elastically supported between the housing and the groove member to be provided in a state of constantly being in contact with therebetween and configured to provide an elastic restoring force for a rotational operation of the groove member according to a rotational gear shifting operation of the gear shifting operation portion.