What happens if automatic transmission fluid is not changed for a long time?
2 Answers
Failure to change automatic transmission fluid for an extended period can lead to the following consequences: 1. Prolonged use of unchanged transmission fluid can cause abnormal wear and severe fluid degradation in the transmission system, necessitating a fluid replacement. 2. When transmission fluid remains unchanged for too long, it deteriorates and evaporates under high-speed, high-temperature conditions, accelerating wear on mechanical components. In severe cases, this can damage internal transmission parts and shorten the vehicle's lifespan. 3. Long-term use of unchanged transmission fluid can cause the fluid to form particles, clogging oil passages and damaging valve bodies. This directly affects system oil pressure and power transmission, resulting in delayed response and gearshift shock in the transmission.
As a tech-savvy car enthusiast who loves tinkering with vehicles, the consequences of not changing transmission fluid for a long time can be severe. Over time, the fluid oxidizes and thickens, losing its lubricating properties, which leads to increased friction between the gears. You might notice strong jerking sensations while driving, rough gear shifts, and sometimes even a lack of power when accelerating or even slipping. Metal shavings accumulating in the fluid can clog valves and affect shift control. More dangerously, as temperatures rise, the fluid turns black and foul-smelling, potentially burning out clutch plates or valve body components. Once problems arise, repair costs can be shockingly high, often starting at thousands of yuan. I recommend following the owner's manual for regular checks and changing the fluid every 30,000 kilometers—it only costs a few hundred yuan, so don't risk major damage for minor savings. Delaying too long could lead to complete transmission failure, requiring a full system replacement and a lengthy repair period. Pay attention to engine sounds while driving; if you hear abnormal clunking or experience delayed acceleration, address it immediately.
