I bought the Classic Ind. replacement neutral safety switch for my 400 and just put it in. Unfortunately, my fustration level is building to new heights. When trying to adjust and position the switch so the back-up lights would go on in reverse, then throw it in park, the car wouldn't start. When 'backing' it off a little bit so the car would start, then the back-ups wouldn't light up in reverse but they would in neutral. I must have spent hours trying to adjust the position of the switch and when I thought I might have it and tighten it down, one of the two scenerios would prove me wrong. I'm ready to pull my hair out with this one! (And I don't have that much to work with)