Automobile gearbox oil pan gasket usually adopts the following materials:

1. Paper gasket: Paper gasket is a common material for oil pan gasket of gearbox, usually made of paper or cellulose. Its advantages are low price, easy replacement and good sealing performance. However, paper gasket has poor wear resistance and high temperature resistance, and is easily affected by oil and high temperature environment, so its service life is relatively short.

2. Rubber gasket: Rubber gasket is usually made of rubber or rubber composite material, which has good oil resistance and high temperature resistance and can provide good sealing performance. Rubber gasket has good wear resistance and corrosion resistance, and its service life is relatively long. However, the price of rubber gasket is high, so it is necessary to pay attention to choose the appropriate model and specification when replacing it.

3. Metal gasket: Metal gasket is usually made of metal materials such as aluminum alloy or stainless steel, which has good wear resistance and high temperature resistance and can provide good sealing performance and durability. Metal gasket has good corrosion resistance and long service life. However, the price of metal gasket is high, so it is necessary to keep the surface flat when replacing it to avoid damaging the sealing performance.

To sum up, the materials of automobile gearbox oil pan pad mainly include paper, rubber and metal. Gaskets made of different materials have their own advantages and disadvantages. Choosing the right material can improve the sealing performance and service life. When replacing the oil pan gasket of the gearbox, it is suggested to select the appropriate materials and specifications according to the vehicle model, use environment and performance requirements to ensure the normal operation and sealing performance of the gearbox.