Transmission Cooling - Overview

This vehicle is equipped with a transmission fluid warmer, a cooler bypass valve and a transmission fluid cooler. The transmission fluid warmer is a coolant-to-transmission fluid heat exchanger mounted on the transmission. The transmission fluid cooler is a transmission fluid-to-air fluid cooler which is mounted in front of the A/C condenser. The cooler bypass valve is mounted on the transmission. When the transmission fluid is below normal operating temperature, transmission fluid travels from the transmission to the transmission fluid warmer, to the cooler bypass valve and back to the transmission. When the transmission fluid is at or above normal operating temperature, the transmission fluid cooler coolant control valve closes, stopping coolant flow to the transmission fluid warmer. The cooler bypass valve opens allowing transmission fluid to travel from the transmission through the cooler and back to the transmission. The transmission fluid cooler transfers heat from the transmission fluid to the ambient air.