I got this problem with my 1.8iSdrive automatic. I can actually feel the transmission change from 1st to 2nd gear, especially during heavy traffic conditions. My car is relatively new, only 550kms so far. Before I didn't feel this but lately on low speeds, it is becoming more obvious. The feeling is so bad since you can feel the car jerk a bit. I thought it was the quality of gasoline. I'm using 97-octane petrol. I will drive it for a while and will see if the conidition improves. Any one there noticed the same problem?