How often should the transmission gear oil be changed

The gear oil of the automobile transmission is generally replaced every 120000 km under normal driving conditions, and every 60000 km under bad driving conditions. Its main functions are: 1. The main function of the gear oil of the transmission is to keep the gear shift system clean, lubricate and extend the life of the transmission device; 2. As different gearbox designs are divided into manual gearbox and automatic gearbox (also divided into CVT, AMT, etc.), each gearbox design has different technical requirements; 3. Even if the same type of gearbox is configured in different models, its torque, weight, speed, structure, etc. are different. Therefore, the original factory has its own special transmission oil.