Transmission Cooling - Overview

The transmission fluid cooling system consists of the following:

• An oil-to-air transmission fluid multi cooler
• An auxiliary transmission fluid cooler (3.7L Duratec engine)
• Transmission mounted transmission fluid cooler tube assembly
• Transmission fluid cooler bypass valve
• Transmission fluid cooler inlet hose
• Transmission fluid cooler return hose

These vehicles are equipped with an external transmission fluid cooler. The transmission fluid cooler is part of the A/C condenser and cannot be serviced separately. The cooler is mounted in front of the engine radiator. For vehicles equipped with a 3.7L Duratec engine, there is also an auxiliary transmission fluid cooler. If equipped, the auxiliary transmission fluid cooler is mounted in front of the A/C condenser. The transmission fluid cooling system also consists of a transmission fluid cooler bypass valve which is mounted on the transmission main control cover. When the transmission fluid is below normal operating temperature, transmission fluid travels from the transmission to the transmission fluid cooler bypass valve then back to the transmission. When the transmission fluid is at or above normal operating temperature, the transmission fluid cooler bypass valve opens allowing the transmission fluid to travel from the transmission through the transmission fluid cooler then back to the transmission. The transmission fluid cooler transfers heat from the transmission fluid to the outside air.