I think this is how you do it: Get a vacuum gauge and hook it into the line that goes to the vacuum modulator on the trans with a "T" fitting. At idle you should see about 10in of vacuum. When the engine speed is increased the gauge should drop progressively to 0in vacuum at high rpm. This will tell you if the correct vacuum signal is reaching the trans. If all seems okay try adjusting the bowden cable and the vacuum modulator. Experiment with each and see what happens. RT

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