This problem seems to have gotten worse over time. Its an 02 Passat V6. For some reason the engine RPM's will lug down to about 1200 before it'll kick down to the next gear. You keep stepping on the gas stepping on the gas then it'll kick down to the lower gear and take right off. If you just stomp on the gas it'll kick right down but if you're trying to be smooth and maintain speed it'll lug right down and you have to push the gas pedal pretty far before it'll actually kick down. Any clues?