A faulty seal with the torque converter will result in the transmission fluid to leak out from the torque converter, and thus the force inside the converter are going to be lost. Once the clutch is disengaged, the torque converter allows the engine to rotate without the need of stalling. https://torque-converter-clutch64173.jaiblogs.com/61254342/how-torque-converter-clutch-can-save-you-time-stress-and-money