Yeah I think it goes to the modulator. It's got a green cap at the transmission end of the line where it fits in. Is that indeed the modulator? As I said, it isn't connected to the vacuum connector and if I do plug it back in, it doesn't shift into 2nd gear right. Just wants to rev up in first gear. Do I need a new modulator or could it be another problem? How do I check if the modulator is working properly? Thanks...

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1984 300d....