Should the Filter Be Replaced When Changing Transmission Fluid?
2 Answers
Whether the filter needs to be replaced when changing transmission fluid depends on the actual situation. In most cases, the filter should be replaced during a transmission fluid change, especially for CVT and wet dual-clutch transmissions. Transmission fluid helps keep the gear system clean and lubricates the transmission components, extending their lifespan. The functions of a transmission include: 1. Changing the gear ratio to expand the range of torque and speed variations for the drive wheels; 2. Allowing the vehicle to move in reverse while maintaining the engine's rotation direction; 3. Using neutral gear to interrupt power transmission, facilitating gear shifting or power output; 4. Enabling the installation of a power take-off unit.
As an experienced driver who has owned various car models, I highly recommend replacing the filter element when changing transmission fluid. The filter acts like a strainer for the transmission - over time it gets clogged with metal shavings and sludge. If you don't replace it, the new fluid will quickly become contaminated, actually harming the transmission's lifespan. For instance, last time I tried to save money by skipping this step, and within months I experienced rough gear shifting, ending up spending thousands on repairs - regrets came too late. Vehicle manuals typically recommend replacing both fluid and filter together, especially for automatic transmissions where the filter is located inside the oil pan - you can accomplish both tasks in one disassembly. The filter itself isn't expensive, just tens of RMB, and while labor costs may be slightly higher, it's worth it. Don't neglect regular transmission maintenance - when you notice the fluid color has darkened or contains excessive impurities, it's definitely time for a change.
