
Transmission should be serviced every 2 years or every 40,000 kilometers driven. Different vehicle models may have different requirements, so it's advisable to refer to the maintenance manual for appropriate automatic transmission service intervals. Transmissions are divided into manual and automatic types. Manual transmissions mainly consist of gears and shafts, achieving speed and torque variation through different gear combinations. Automatic transmissions are composed of a torque converter, planetary gears, hydraulic torque variation systems, and hydraulic control systems. The function of the transmission is to change the transmission ratio, expanding the range of torque and speed variation of the driving wheels to adapt to frequently changing driving conditions, while allowing the engine to operate under favorable working conditions.

I've been driving for over a decade and know a thing or two about transmission maintenance. Manual transmissions are relatively low-maintenance; I usually change the oil only every 80,000 to 100,000 kilometers. Automatics are more delicate—if you're driving in hot, congested city conditions, you should check the oil and filters around 40,000 kilometers. The manufacturer's manual is usually the authority. For instance, my old Toyota's manual recommends servicing every five years or 70,000 kilometers, but I opted for earlier maintenance to avoid major repairs—shifting became smoother post-oil change, and it extended the transmission's lifespan. Driving conditions matter too: frequent towing or uphill driving increases oil temperature and accelerates aging, necessitating shorter intervals. Don't wait for strange noises or gear slippage to act—repairs can be costly. Regular maintenance saves you a bundle, so find a reputable shop.

After working in the auto repair shop for years, I've seen too many cases of transmission failures due to neglected maintenance. The basic rule is: change automatic transmission fluid every 30,000 to 60,000 kilometers, slightly less for manual or CVT types, but always adjust based on vehicle condition. Driving habits determine everything – frequent short trips accelerate fluid degradation, so inspect every two years. High-temperature or dusty environments require more frequent filter changes. Act immediately if you notice symptoms like delayed gear shifts. Simply checking fluid level and color helps: darkened/blackened fluid or unusual odors signal aging. Use quality fluids and OEM parts – prevention saves money. Avoid aggressive acceleration in daily driving. Long-term neglect damages seals (causing leaks) and reduces transmission efficiency (increasing fuel consumption).

I'm a new driver, and the topic of transmission maintenance was taught to me by my neighbor uncle. He said changing the transmission fluid every 50,000 kilometers or around four years is the safest bet, with manual transmissions able to go a bit longer. The manufacturer's manual is the guidebook; for example, my new car specifies a 60,000-kilometer interval. Not changing the oil in time can lead to jerky gear shifts, and in severe cases, even breakdowns, which is quite dangerous. For peace of mind, opt for professional services—they can also check other components like bearings or linkages. In winter, let the car idle for a few minutes before driving to warm up the oil and protect the gears. Simple DIY tasks like regular fluid checks can also prevent major issues. Spending a little money to extend the car's lifespan is worth it.


