Technician A says that torque converters generates heat. Technician B says cooling systems in a transmission maintains effective fluid temperature. Which technician is correct?

Both Technician A and Technician B are correct. Technician A is correct in saying that torque converters generate heat. This is because the torque converter is a type of fluid coupling, which allows the engine to spin somewhat independently of the transmission. If the engine is turning slowly, such as when the car is idling at a stoplight, the amount of torque passed through the torque converter is very small, so keeping the car still requires only a light pressure on the brake pedal. If you were to step on the gas pedal while the car is stopped, you would have to press harder on the brake to prevent the car from moving. This is because when you step on the gas, the engine speeds up and pumps more fluid into the torque converter, causing more torque to be transmitted to the wheels.

Technician B is also correct in saying that cooling systems in a transmission maintain effective fluid temperature. The transmission fluid in a vehicle needs to be cooled to prevent damage to the transmission. This is done by using the cooling systems. The transmission fluid is cooled by the radiator which has a separate compartment for the fluid to pass through. The fluid is also cooled by an external transmission cooler which is usually located in front of the radiator. The transmission fluid helps to cool the transmission and also helps to reduce the wear and tear on the transmission components. Therefore, both technicians are correct.