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Old 05-09-1999, 11:05 PM
Benzmac
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There is a vacuum line that is routed from the rear of the engine to the modulator valve and is resposible for giving the signal that tells the trans how hard to shift. If the line is cracked or the ends where it attaches to the engine and modulator are loose the shift quality will be harsh...You also could have a bad modulator valve or the cap also falls off on occasion.
Good luck

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