My nissann sentra 2005 1.8 Engine having 100,000 miles is having a sudden jerk when accelerate from gear 1 to 2. It doesn't happen when driving beyond gear 2. It happens more frequently when the engine is cold. But it's consistent when does this happen. Once I took it to my nissan service center, and I was unable to duplicate the problem. Then it started again. Seems like there is some transmission problem. Does anyone experiences this type of problem for nissan sentra 2005 1.8 Engine.