Sounds like you may have a transmission problem. Try moving the w/s Switch to the other posistion from what is is now. Does this make a differance? Do you notice if this allways happens? Happens only after comming to a stop quickly? ie being stoped before downshifting is complete? Not a sudden stop. Your car is still well within warr. I sure that if you discuss your concern with a Service Advisor that it can be resolved. If this is not a consistant fault. Have a technician or the shop foreman ga for a road test with you when you drop the car off for service. These road test are one of the best tools that they have for identifing and repairing a problem.