Torque converter is designed to make sure the correct amount of fluid to passed on to transmission and allows the engine keep working while your BMW is not running. If something unusual happen, like shuddering and slipping, and then your torque converter may suffer failing now. However, it is not easy to tell if the torque converter is right, and there are too many potential reasons to blame if the malfunction happens. Here are some symptoms indicating that your torque converter has problems: if you notice that the temperature gauge is overheating; if you notice that there are large amounts of black material in the fluid; if you notice your stall speed increase; if you hear some strange sounds, you have to buy a new torque converter to make your car complete. We offer you all BMW OEM torque converter and we reduce price to make you have a better shopping experience.