What is the average lifespan of a gearbox?

The average lifespan of a transmission varies depending on its type, operating conditions, and maintenance. Manual transmissions (MT) are simple in structure and durable, and can typically last over 15 to 20 years with proper maintenance. Automatic transmissions (AT) have a lifespan of approximately 10 to 15 years. Continuously Variable Transmissions (CVT), due to their steel belt design, have a lifespan of about 300,000 to 400,000 kilometres, which may translate to 8 to 10 years in actual use. Dual-Clutch Transmissions (DCT) last around 8 to 12 years under normal operating conditions. It is best to use high-quality transmission fluid, avoid aggressive driving, and change the fluid every 40,000 to 60,000 kilometres to extend service life. Additionally, shifting to neutral (N) when parking to reduce load can significantly improve the reliability and durability of the transmission.