Q: sudden lunges during acceleration on 2006 Ford Fusion

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This mostly happens during acceleration.
Slowing down, and then accelerating back to speed.
Sometimes the sudden jerks are very strong.
Also, it seems to lose power aftert he car has been driven for about an hour, you go to accelerate and it almost feels like it will not go into gear and then the lunging happens.
(3) Answers
Had this same problem with mine too. Thought problem was in tranmission but recently found out my cv axle was bent/broken on drivers side. Have yours inspected. Fixed my problem ;)
This happened to mine also..First I had the car 'flashed' to reset. didn't work. I ended up having to replace my transmission.