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Does the Valve Body Oil of Dry Dual-Clutch Need to Be Replaced?

2 Answers

McHailey

08/27/25 2:33am

The valve body oil used in dry dual-clutch transmissions refers to the transmission oil, which needs to be replaced regularly. Since the components of the gear set require lubrication during operation, failure to replace the transmission oil for an extended period can lead to abnormal transmission performance. Relevant details are as follows: 1. Replacement Interval: The replacement interval for transmission oil is two years or 40,000 kilometers under normal usage conditions. If the vehicle is frequently driven aggressively, it is recommended to replace the transmission oil earlier. 2. Viscosity of Transmission Oil: When replacing the transmission oil, it is essential to choose oil with the appropriate viscosity for the transmission. If the viscosity of the transmission oil is too high, it can cause excessive heating of friction surfaces during operation, leading to unnecessary power loss. Conversely, if the viscosity is too low, the transmission may be prone to oil leaks.

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Gabrielle

09/08/25 9:17am

As a car enthusiast, I particularly enjoy discussing these maintenance details. The hydraulic fluid in a dry dual-clutch transmission's valve body indeed requires regular replacement—this is based on my hands-on experience with several vehicles. Although this type of transmission is labeled 'dry,' its valve body relies on fluid to control gear shifts. Over time, the fluid oxidizes and degrades, accumulating impurities that eventually compromise shift smoothness and even cause clutch response lag. I recommend inspecting it every 40,000–50,000 kilometers or every two years, ideally having a professional shop test the fluid condition. Neglecting this may turn minor issues into major troubles, such as sudden gear-shift hesitation or power loss, which can be dangerous at highway speeds. By the way, regular valve body fluid maintenance extends the entire dual-clutch system's lifespan, saving money and ensuring peace of mind—don’t wait until warning lights prompt repairs.

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