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How does a transmission cooler work?

Updated: Jun 6, 2023


A transmission cooler is a component in a vehicle's transmission system that helps to keep the transmission fluid cool. The cooler works by transferring heat from the transmission fluid to the surrounding air or a coolant system.


Here's how a transmission cooler works:


Transmission fluid enters the cooler: The hot transmission fluid flows from the transmission to the cooler, typically through hoses or tubes.


Heat transfer occurs: The transmission fluid flows through a network of tubes or fins inside the cooler, which are designed to maximize surface area and exposure to the cooling medium. As the hot transmission fluid flows through the cooler, heat is transferred from the fluid to the surrounding air or coolant system.


Cooled fluid returns to the transmission: The cooled transmission fluid then flows back to the transmission through the return hose or tube. The cooler transmission fluid helps to maintain the proper operating temperature of the transmission and prevents overheating, which can cause damage to the transmission.


Transmission coolers can be installed in a variety of locations, including in the radiator, in a separate cooler mounted in front of the radiator, or as an external stand-alone cooler mounted in a different location on the vehicle. Some transmission coolers use an electric fan to increase air flow through the cooler, while others rely on the natural air flow created by the vehicle's movement.


In summary, a transmission cooler works by transferring heat from the transmission fluid to the surrounding air or coolant system, helping to maintain the proper operating temperature of the transmission and preventing overheating.

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