Transmission failures typically don't occur suddenly. The unit shows signs of impending failure long before it fails completely, but most drivers mistake the signs for minor issues until the car no longer moves. At that point, the tow truck is called, and it’s usually too late for the transmission; the damage is typically permanent. The better thing to do is catch the signs early enou... https://usedengine.online/5-warning-signs-you-need-a-used-transmissions-replacement/