Over the past month, on two occasion, the transmission has made a sudden jolt and "clunk" feeling when coasting following initial acceleration. The car is 11 months old and has 10,000 miles. The problem was not noticed last winter when the weather was cold. Has anyone experienced this problem? Today, it felt as though the transmission was ready to drop out of the car. Perhaps the eight speed transmission provides too many gears to have a truly smooth operating car.