Vehicle first jerked when backing out of a parking spot. Then it started doing it when taking off. At first I thought it was me, since engine light didn't come on. Called Jeff Michaelson and he said to watch if the engine light comes on. It did ... I called Jeff again and he got me in right away. It was funny, the other solenoid valve went a month earlier, but all that happened was the engine light came on and wouldn't go off. I kept in touch from beginning to end and when the light came on and it started acting worse, Jeff got me in right away.