I have had my car jerk on long trips since i got the car. No resolution yet and doesn't happen of course when a tech is in the car. It happens more frequently now - since i've had the car 2.5 years now!!! Sometimes the jerk is really bad - probably enough to give you a little whiplash and then others it's just slight. DOesn't always happen after each trip but most of them. My trips typically consist of a 60 miles trip, even happens on a 30 mile trip on the high way! I really have to be careful when i get off the exit and make that first stop so i'm not stopping to close to another vehicle so i can control the car!!!