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The automatic transmission thermostat fits into the bottom of the coolant expansion tank and help to regulate the temperature of your transmission fluid. These usually break when being removed, so it's a good idea to have one on hand when replacing the expansion tank.MAHLEAutomatic Transmission Thermostat
The automatic transmission thermostat fits into the bottom of the coolant expansion tank and help to regulate the temperature of your transmission fluid. These usually break when being removed, so it's a good idea to have one on hand when replacing the expansion tank.
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