3.3L Duratec - V6 Engine and Raptor

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

The transmission fluid cooling system for 3.3L Duratec - V6 and the Raptor consists of a transmission fluid warmer with an integral bypass valve and an external transmission fluid cooler. Transmission fluid cooler tubes and hoses connect the various components together.

The transmission fluid warmer has engine coolant flowing through it to warm the transmission fluid during the engine warm-up period. A coolant control valve attached to the coolant return hose allows coolant flow through the warmer when the transmission fluid is cold. At a predetermined temperature, the PCM signals the valve to close, shutting off coolant flow to the warmer. The transmission fluid bypass valve on the warmer directs transmission fluid either back to the transmission or to the cooler depending on transmission fluid temperature.

Transmission fluid travels from the transmission to the transmission fluid warmer, then to the transmission fluid cooler and back to the transmission. The transmission fluid coolers transfer heat to the ambient air.