Yes, an additional automatic transmission radiator usually requires a thermostat.
Thermostat operating principle:
* When transmission fluid temperature is low, the thermostat remains closed, preventing fluid from flowing through the auxiliary radiator.
* When the fluid temperature reaches the set point, the thermostat opens, allowing fluid to circulate through the additional radiator.
Thermostat functions:
* Helps regulate fluid temperature: The thermostat opens and closes as needed to maintain the optimal operating temperature of the automatic transmission.
*Improves Cooling: Opening the thermostat allows fluid to circulate through the auxiliary radiator, increasing transmission cooling efficiency.
* Prevents Overheating: A closed thermostat prevents cold fluid from passing through the auxiliary radiator, which helps maintain the transmission’s operating temperature and prevents overheating.
Consequences of not having a thermostat:
* Insufficient cooling: Without a thermostat, fluid will always circulate through the additional radiator, even when it is not needed. This can lead to excessive cooling and reduced transmission efficiency.
* Overheating: On the other hand, not having a thermostat can also cause the transmission to overheat if fluid is not circulating through the auxiliary radiator when needed.
Recommendations:
To ensure proper cooling and prevent problems with the automatic transmission, it is recommended to install a thermostat along with an additional radiator.