 I bought a new 2010 Camry. it has had a clunk when leaving a stop light with 3/4 to full tank of gas. It sounds as if the spare tire shifted. I have taken it in to HOOVER TOYOTA, Alabama 3 times and had a Toyota engineer come out and the dealer, engineer and service manager all heard the clunk. They went on to tell me it is within spec. I will never by a Toyota again. The dealer was so set on dodging the issue. The engineer told me it was something I had to deal with. I don't think a new car under 3000 miles should feel as if something is shifting in the trunk when you take off.  Very bad service and car never again!