What is the Difference Between Wet and Dry Transmissions?

[DeRosalie]

Here are the differences between wet and dry transmissions: 1. Transmission efficiency: The structure of a wet clutch is more complex, and the more complex the structure, the higher the energy loss. Therefore, the transmission efficiency of a wet dual-clutch transmission is lower, consuming more engine power. Under unchanged conditions, this means higher fuel consumption. 2. Response speed: A dry clutch transmits power directly through metal plates, resulting in more direct power transfer. When the metal plates are pressed tightly, the transmission ratio increases, delivering immediate and noticeable effects. In contrast, a wet clutch relies on oil as an intermediary—first, the driving disc accelerates, increasing the centrifugal force of the oil, and then the driven disc speeds up. This additional step results in a slightly slower response speed. 3. Torque capacity: The metal friction plates of a dry clutch cannot withstand excessive torque. If subjected to too much stress, the friction plates can easily be damaged. As a result, dry clutches are only suitable for small-displacement, low-torque-output vehicles. Some models even deliberately limit the engine's torque output in lower gears to protect the dry clutch, such as the Verano's transmission protection mechanism.