CTS V6-3.2L VIN N (2003)
Transmission Cooler: Description and Operation
Transmission Oil Cooler-Two Fan System
Notice:
The transmission oil cooler lines use a quick connect fitting at the radiator. The quick connect fitting must be removed using a special tool.
Removing the transmission oil cooler lines without the tool will result in damage to the radiator and the transmission oil cooler, and may
damage the transmission due to mixing of the transmission oil and coolant.
The transmission oil cooler is a heat exchanger located in the bottom tank of the radiator. The transmission oil temperature is regulated by the
temperature of the coolant leaving the radiator and passing over the heat exchanger. Lines from the transmission bring oil pumped at a high pressure to
the cooler and back to the transmission.
Transmission Oil Cooler-Three Fan System
Notice:
The transmission oil cooler lines use a quick connect fitting at the radiator. The quick connect fitting must be removed using a special tool.
Removing the transmission oil cooler lines without the tool will result in damage to the radiator and the transmission oil cooler, and may
damage the transmission due to mixing of the transmission oil and coolant.
There are two transmission oil coolers in a series in the heavy duty transmission oil cooler system. The initial transmission oil cooler is a heat exchanger
located in the bottom tank of the radiator. The transmission oil temperature is partially regulated by the temperature of the coolant leaving the radiator
and passing over the heat exchanger. Lines from the transmission bring oil pumped at a high pressure to the cooler. The oil out of the cooler is plumbed
to an air-to-oil cooler in front of the A/C condenser. This cooler provides additional cooling for heavy duty trailering. The transmission oil is then
directed back to the transmission.
