Will the transmission show immediate symptoms when water enters?
2 Answers
After water enters the transmission, there will be no immediate signs of malfunction, but symptoms will gradually appear within two weeks. Water ingress can cause internal components of the transmission to rust and also lead to deterioration of the transmission fluid. If the transmission malfunctions, it should be repaired immediately, and original equipment manufacturer (OEM) parts should be used during repairs. Symptoms of water in the transmission: 1. Minor water ingress: Some screws inside the transmission may rust. It is advisable to replace seals, gaskets, and other components to extend service life, and it is recommended to change the transmission fluid and differential oil. 2. Moderate water ingress: White deposits appear in the oil pan. When oil mixes with water, a white emulsion forms and adheres to the oil pan. If such deposits are present, it indicates moderate water ingress in the transmission. Seals, gaskets, and other components, as well as the transmission fluid and differential oil, must be completely replaced. 3. 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 the transmission, requiring prompt inspection and repair. Similar to moderate water ingress, but in severe cases, the sprocket may also need replacement.
When water enters the transmission, there are usually immediate reactions, but they aren't always obvious. I've experienced this myself—after driving through a puddle, the car started shaking within minutes, and gear shifts felt rough, as if something was stuck. This happens because the transmission fluid, once contaminated with water, emulsifies or dilutes, reducing its lubricating effectiveness. As a result, friction between gears and bearings increases, often leading to unusual noises or slipping. Even a small amount of water can trigger warning lights during startup or low-speed driving. In short, symptoms tend to appear quickly after water ingress. If left untreated, long-term damage to internal components can occur, doubling repair costs. If you notice any abnormalities, it's best to stop and inspect immediately or seek professional diagnosis to prevent further issues. Additionally, avoiding deep water while driving can help minimize such risks.
