I own a 2009 Challenger RT with only 21K miles. It was bought new, so it's a garage princess these many years. This past weekend I took it out to a local car show, and on the way back home, it shudder and went into some sort of limp mode. After getting home, I put a scanner on it. The code (U0101) is saying communication was loss in the TCM. I googled the issue, and many experiencing the same problem made suggestions I tried them, but to no success. I had it towed to my local repair shop because the engine light, and traction control lights stayed lit. I am still waiting on a diagnosis and repair cost. I am guessing that the issue lies at the rear end since the traction lights are constant. I attempted to clear the code, but to no avail. Any ideas?