The Difference Between Wet and Dry Transmissions?
2 Answers
Dry transmission and wet transmission differ in the following aspects: 1. The working environment of the clutches in the two types of transmissions is different: The clutch of a wet transmission is immersed in transmission fluid, while the clutch of a dry transmission is in direct contact with the engine flywheel. 2. The response speed of the clutches in the two types of transmissions is different: The dry transmission involves direct contact transmission, which provides more direct power transfer. The metal plates are pressed tightly, increasing the transmission ratio and resulting in better performance. In contrast, the wet transmission has an additional step—from the driving disc speeding up to the increase in fluid centrifugal force, and then to the driven disc speeding up—which makes its response speed slightly slower. 3. The fuel economy and torque capacity of the two types of transmissions are different: The dry transmission saves on related hydraulic systems and, due to its inherent efficiency in transmitting torque, is more fuel-efficient than the wet transmission. However, if the dry transmission is subjected to excessive stress impact, it can easily lead to damage of the friction plates. The wet transmission does not have this concern, thus it has a stronger torque capacity.
Wet and dry transmissions mainly differ in their cooling methods. Having driven various cars, I find that wet ones feel more durable in urban traffic jams because their clutches are immersed in oil, which provides better heat dissipation. They are less prone to overheating during traffic congestion or uphill driving, and gear shifts are smoother. However, the downside is higher oil consumption and a slightly heavier vehicle body. Dry transmissions rely on air cooling, making them lighter and more fuel-efficient, suitable for daily commuting. But if you frequently floor the accelerator, they can overheat and malfunction, potentially leading to higher maintenance costs. For long-distance driving, wet transmissions are recommended, while dry ones are better for city commuting. Don’t forget to regularly maintain and check the fluids.
