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How long does it take for symptoms to appear after water enters a dry dual-clutch transmission?

1 Answers

ValerieFitz

07/29/25 9:09pm

Generally, problems will appear after driving about 10 kilometers if water enters a dry dual-clutch transmission. If there is water inside the transmission, it should be replaced promptly; otherwise, the transmission may be damaged. The gear transmission inside requires oil, and the presence of water will dilute it, affecting performance. In such cases, the transmission fluid may be diluted, leading to issues like delayed gear shifting and impact. Additionally, it can impair the cooling effect of the transmission fluid, causing emulsification, reduced lubrication, and decreased wear resistance, ultimately shortening the transmission's lifespan. There are several reasons why water may enter the transmission: The transmission is not completely sealed, and water can enter directly through the vent hole. If an automatic transmission operates in cold water and the water level is high, the vent hole can draw water inside. Excessive road water splashing onto the vehicle body can cause water to enter the automatic transmission. Mild water ingress: Some screws inside the transmission may rust. Moderate water ingress: White deposits may appear in the oil pan. When oil mixes with water, it forms a white emulsion that adheres to the oil pan. The presence of such deposits indicates moderate water ingress. Severe water ingress: This can be determined by the color and viscosity of the transmission fluid. Water in an automatic transmission can corrode steel screws inside, requiring immediate inspection and repair.

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