don't know, most of my info relies on what I find on the internet. Im sure some will know here but what I can tell you is that there are no vacuum lines to it, no electrical connectors other than the two wire for the safety neutral switch and a mechanical speedo cable. I once had a vehicle that would stay in lock up coming to a stop and do the same thing completely cut the engine off. id unplug the lock up converter and boom drive away. sure does feel similar to that experience. going to guess being that old non lock up? I think the valve body is a real basic hydraulic unit. real cool car though, well engineered I think. was thinking of doing a tranny service to c if that makes any difference.