I just changed the engine on my 300ce. The last one threw a rod right through the oil pan and dented the cross member. Opting to buy a used engine, I pulled the engine and tranny out together. I pulled the old engine off, removed the drive plate off the blown engine and placed it on the new one. I matched the torque converter exactly to the drive plate. Now, the engine starts perfectly. However, when I shift the darn stick into drive----a rough tapping sound emits from the bell housing. Any advice? Could this be a bad torque converter?