This all started when it wouldn't stay in first gear off the line. It would go to second without shifting it. Thinking it's a valve body issue I changed it to a manual valve body. Today I get to the track and I can't get it to start off in first gear. I rechecked the linkage and was ok. Every once and a while it will start off in first going though the pits and I shift it to second but then can't get it to go back into first again. Is this a valve body issue or something else? The manual valve body worked in another car before I got it.