Should the Oil Pan Be Replaced When Changing Transmission Fluid?

[LaEliza]

Transmission fluid requires the replacement of the oil pan. As a core transmission component, the transmission undergoes mechanical wear, and the transmission fluid also degrades over time. Therefore, replacing the fluid, oil pan, and filter is essential. The methods for changing transmission fluid are as follows: 1. Gravity Drain. The method and principle are similar to changing engine oil—loosen the fastening nut at the bottom of the oil pan, and the transmission fluid will automatically drain from the oil drain hole. 2. Machine Flush. New transmission fluid is added to a flushing machine, which connects to the transmission's fluid lines. The new fluid pushes out the old fluid under pressure, resulting in a cleaner flush of the fluid lines. The more new fluid is used, the cleaner the lines become. A machine flush typically requires about 10 liters of fluid and takes longer, usually around an hour. 3. Oil Pan Removal. This method allows for cleaning the oil filter and flushing the oil pan, addressing the issue at its root. However, the disassembly process is more complex.