Fluid Coupling: It lets the motor to operate independently with the transmission, so the auto can stop with no stalling the motor. The PCM/TCM won't established a DTC unless there is a problem with the electrical circuit controlling the torque converter clutch solenoid. It allows the engine to spin considerably https://torqueconverterclutch97418.blogginaway.com/34615589/the-2-minute-rule-for-torque-converter-clutch