ok so here is my story, and this has been happening for a good 4 years now. whenever i change years mainly from 1st to second I can feet it change, I hear like a pop, and I can feel the car vibrate, espically in the steering wheel. Now, when I slap the stick to 3rd gear and drive in that gear, it shifts smooth, and I have less vibration. As soon as I go back into D, I feel more vibration and the changing gear pop and vibration. What can this be leading to? I have had a tranny flush, also have added DR Trannys Shutter fix, and nothing seems like it works. Anyone??