Does Transmission Fluid Need to Be Changed?
2 Answers
Transmission fluid does need to be changed. Here are the relevant details about transmission fluid replacement: 1. Dry dual-clutch transmissions and manual transmissions have similar structures, so they both use synthetic transmission fluid with a service life of approximately 150,000 kilometers. Most automatic transmissions require fluid replacement every 60,000-80,000 kilometers. 2. The transmission fluid replacement interval is only a general guideline. Due to factors such as driving conditions and habits, the condition of the transmission fluid may vary. If the vehicle experiences symptoms like rough shifting, strong jerking sensations, or significantly increased noise during operation, it's necessary to check whether the transmission fluid needs replacement. 3. There are three common methods for changing transmission fluid: (1) Gravity drain: Similar to engine oil changes, this involves loosening the transmission drain plug to release the fluid, then refilling through the fill port. The drawback is that gravity draining doesn't completely remove all old fluid. (2) Machine flush: A transmission flush machine connects to the transmission's fluid lines, using new fluid to push out the old fluid from inside the transmission. The advantage is more thorough replacement, while the disadvantages include being time-consuming and requiring more transmission fluid. (3) Removing the transmission pan: The advantage is the ability to clean or directly replace the transmission filter, with relatively thorough fluid replacement. The drawback is the more complicated installation process.
Transmission fluid definitely needs to be changed, and this is not something to be taken lightly. In my daily work helping people repair cars, I've encountered too many cases where owners thought the fluid was still usable, only for it to deteriorate and become dirty, increasing internal friction in the transmission. This causes gear shifts to become jerky and, over time, can lead to major transmission overhauls. Manual transmissions are relatively more durable, requiring fluid changes approximately every 40,000 kilometers, while automatics need more frequent attention, with checks and changes recommended around every 60,000 kilometers. Failing to change the fluid in time can cause the transmission to overheat, shortening its lifespan, and repairs can easily cost thousands. I advise car owners to stick to regular maintenance schedules and not skimp on these costs. Additionally, depending on driving habits—such as frequent stop-and-go traffic or long highway drives—it's wise to check the fluid condition more often. This isn't meant to scare anyone; safety truly comes first. While simple checks of fluid level and color can be helpful, I strongly recommend having this handled by a professional shop.
