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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1655 (Engine Cooling System) >> Description and Operation >> Cooling System Description and Operation (With HP5) >> Cooling System >> Transmission Oil Cooler

Transmission Oil Cooler

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The transmission oil cooler is a heat exchanger. It isan external cooler that is located in front of the high temperature radiator and below the low temperature radiator. A thermal bypass valve is used to prevent transmission oil from flowing through the transmission oil cooler until the oil reaches a specified temperature. Once the oil reaches this temperature, the bypass valve will open and allow the transmission oil to flow through the transmission oil cooler. As air passes through the oil cooler fins, the transmission oil temperature is reduced.

The transmission oil pump, pumps the fluid through the transmission oil cooler line to the transmission oil cooler. The fluid then flows through the cooler where the engine coolant absorbs heat from the fluid. The fluid is then pumped through the transmission oil cooler return line, to the transmission.

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