Re: Transmission Vacuum Modulator

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fyi, after two months of researching, finally found a mechanic worth his salt.  He researched this for me and determined the part is called the transmission inhibitor switch — the FoMoCo box calls it a “switch assembly”.  That was causing the transmission oil leak – the rubber seal had just gone bad.  My mechanic identified the part and, even more importantly, found out where to obtain a new one!  (the Lincoln Mercury old parts store in Clearwater, Florida).  He replaced the bad part, no more transmission oil leak!  URL link for the Lincoln-Mercury Old Parts Store: