Could someone please explain what the lockout is that I was told about from my local transmission shop. I told them what I had (383 stroker), what the trans was (th350), and what happened (vibration before shift points), and the guy said it was probably because my valve body pressure was too low and as such, the trans would burn up. Do any of you know what he was talking about? I had the trans built by cottman, they didnt mention anything about increasing anything so I am not sure what they are talking about. Any ideas?