Due to the harsh working conditions and the large load capacity and travel speed variations required, the upper drive of the machine's travel drive system uses a mature and reliable split hydrostatic transmission system, while the lower drive uses a mechanical, graded transmission capable of high and low speed changes. Some of the hydraulic shock during rapid direction changes can be absorbed by the hose, thus improving the operating performance. The mechanical stepped transmission for the lower stage overcomes the disadvantages of the hydraulic system's low transmission efficiency and allows for fast and slow speed changes. The whole system allows the driver to control the forward and reverse speed of the machine without changing gears according to the engine load, reducing the failure of the machine to stall and the intensity of the driver's operation.

The entire split hydrostatic transmission system of the paddy crawler is divided into four circuits: the variable control circuit, the oil replenishment and oil change circuit, the closed travel main circuit and the brake circuit. The main components of the closed travel circuit are the swashplate axial variable piston pump and the quantitative piston motor. The main components of the variable control circuit are the charge pump, the displacement control valve and the variable piston. The main components of the oil charge and oil change circuit are the oil charge pump, oil charge valve, oil change shuttle valve and relief valve. The main components of the parking brake circuit are the charge pump, the three-way four-way solenoid valve and the motor brake. When parking or braking, the solenoid valve is de-energised in position and the oil from the brake flows back to the oil tank under the action of the spring, realising the braking of the hydraulic motor. This design makes the transport vehicle play a braking insurance role when the vehicle suddenly stalls when climbing a slope or when the driver forgets to brake when parking.

In order to achieve high transport speeds on hard surfaces, a mechanical stepped transmission with two modes, low and high speed, is used, each divided into three gears. When steering, the steering arm on the operator's console is turned to first disengage the steering tooth clutch on one side, cutting off the power transmission. The steering brake is then applied to brake the drive wheels on that side. At the same time, the steering arms on both sides are triggered to brake the entire machine.