Disclosed is a 4-wheel drive of hydraulic manual and automatic transmission of a vehicle running on a road by transmitting rotational engine force to rear wheels, which allows manual or automatic gear shifting using hydraulic rotary machines rotating a main shaft by hydraulic pressure and hydraulic rotary machines independently installed to each wheel and allows to drive 4-wheels including front wheels whitout use of a differential gear. A transmission control panel that is installed to a center portion of a steering wheel and acts as a manual and automatictransmission causing instant gear shifting without a differential gear or a clutch by manipulating a transmission level and a transmission switch in a convenient and easy way. A switch device having many switches concentrated on the fixed center portion of a steering wheel to allow a user to rapidly turn on or off the switch buttons during stopping or running.