I want to replace the vacuum modulator on my transmission (1986 Capri 2.3L, C3 auto), but it appears that there are several different calibrations- denoted by colored stripes on the modulators. The problem- my modulator is completely rusty, so if there was a stripe on it, it's gone! So what do I do? Looking in my Ford dealership manuals and spec books, they still list a few different types. Is there an adjustable modulator available for the C3 so I can tune it?
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