Heat exchanger automatic transmission Subaru Forester
The automatic transmission heat exchanger is an important component in the automatic transmission (AT) of the Subaru Forester. Its main task is to regulate the temperature of the transmission fluid.
Heat exchanger design
* The heat exchanger is a thin-walled coil located inside the radiator.
*Transmission fluid passes through the coil while coolant circulates around it.
* Heat from the transmission fluid is transferred to the coolant, which helps reduce transmission fluid temperature.
Heat exchanger functions
* Transmission fluid temperature control: prevents overheating of the automatic transmission.
* Improved lubrication and extended transmission life: Hot transmission fluid better lubricates automatic transmission components, which reduces wear and extends transmission life.
* Oxidation Protection: Excessively hot transmission fluid can oxidize and create deposits leading to shifting problems.
Signs of a heat exchanger malfunction
* Automatic transmission overheating
* Problems with gear shifting
* Transmission fluid leaks
* Transmission fluid contamination
* Increased wear of automatic transmission components
Heat exchanger maintenance
* Check the transmission fluid level regularly.
* Watch for signs of transmission fluid leaks.
* Flush and replace transmission fluid according to manufacturer’s recommendations.
* Clean the heat exchanger of debris and foreign objects.
Replacing the heat exchanger
If the heat exchanger malfunctions, it must be replaced. Here are the steps involved in replacing the automatic transmission heat exchanger in a Subaru Forester:
1. Drain the transmission fluid.
2. Disconnect the transmission fluid and coolant hoses.
3. Remove the radiator.
4. Remove the old heat exchanger.
5. Install a new heat exchanger.
6. Reinstall the radiator.
7. Connect the transmission fluid and coolant hoses.
8. Fill with fresh transmission fluid.
It is recommended to have the automatic transmission heat exchanger replaced by a qualified mechanic.