Vintage Mustang Forums - View Single Post - Vacuum problems??
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post #2 of (permalink) Old 08-24-2019, 07:53 AM
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Join Date: Jun 2002
Location: Killingworth, CT
Posts: 8,917
Your trans issue sounds like it's low on fluid. The vacuum modulator has no effect on shifting in or out of a gear, it only affects part-throttle shift points.

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