I have an 06 Zephyr & was told that I need a new trans. When the car shifts into high gear it hesitates for a few seconds. Recently it seems to throw the system out of sync, corrects itself after starting it again. Trans may be shot, have 90K miles (70K highway)...just does not make any sense because I have really taken care of the car. The (2) TSB items were never taken care of by the dealers, not sure if this may be the reason for my trans issues. thanks -