Okay, the search turned up random threads, but it did turn up an "aftermarket electronic speedo question," in which I asked this question (with no response). I now have a 2JZ MKIII, which uses boost by speed if the speedometer worked. My question is... "Is there only one cable that works the speedometer needle" I changed one on my 5M that goes from cluster down to the tranny, but I hear there is also another cable to the diff on MKIII's? Feel free to yell at me if you somehow post a link that took you 2 seconds to find, 7yrs military. I'll live.
