The gearbox rubber piston plays a sealing role in the gearbox system, it helps to control hydraulic pressure within the transmission, affecting gear shifts. It is made of special steel and special rubber bonded together, with high temperature resistance of 150 °C and low temperature resistance of -40 °C. It has tensile strength and excellent wear resistance. When the gearbox clutch is working, it has the performance of sealing, pressure resistance, high temperature resistance, and low temperature resistance. During maintenance, replacement is necessary and it is not recommended to reuse it.