What are the symptoms of a bad modulator valve?

Asked by Jul 04, 2015 at 02:11 PM about the 1992 Chevrolet Lumina 4 Dr STD Sedan

Question type: Maintenance & Repair

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65,845

On the transmission? Late or no upshifts. Clouds of grey smoke from the tailpipe. Losing transmission fluid with no visible leaking. But I don't believe that a '92 model has one. It's electronic. HTH. -Jim

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