One problem related to transmission shudder has been reported for the 2007 Chrysler 300C. The most recently reported issues are listed below.
I have also pressed down on the accelerator and nothing has happened and then all of a sudden it shifted!! another complaint I have is that when driving in town and the car is in drive and the fuel saver mode their is a shudder in the transmission between 45 and 52 kilometres per hour!! this does not happen if it is not in the fuel saver mode or when you manually shift it into 4!! I have taken it to my local dealer where I bought the car and they told me that there is nothing they can do at the present moment but to get back to them if it gets any worse!! I have 76000kms on my car now and this started to happen around 70000 kms!! I have extended warranty so I keep my dealer informed of any problems so that they are able to help me out before my warranty goes off!!.