Ok so I had a problem with my OD lockup disengaging and finally found that it was the brake switch. I replaced it and everything was fine. Now two weeks later the lockup is disengaging and locking whenever I hit a bump , and it doesn't even have to be a really big mind jarring one either. I hold my foot under the pedal and it goes away. Should I replace the brake switch again or is there a symptom of a bigger problem like the booster or a vaccuum leak allowing the pedal too much movement when a bump is hit.