Question about 2000 Mercury Grand Marquis

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2000 Mercury grand marquis has frequent intermittent shuddering, especially going up hill, and stops when ever I let off the gas or give it more gas. Also now it's starting to have delayed downshifts while first accelerating and sometimes the rpms will randomly jump up as if the passing gear kicks in for no reason. What is this?

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Sometimes the transmission fluid gets dirty check fluid for burn smell and blackish color if so have it serviced

Posted on May 28, 2011

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  • Brenda Brown
    Brenda Brown May 28, 2011

    the transmission fluid is still bright red so it's not that

  • tim fredrickson May 28, 2011

    ok next check fuel filter for clogged /to do this pull filter if looks at all dirty replace and try again

  • Brenda Brown
    Brenda Brown May 28, 2011

    i have already replaced it not long ago

  • Brenda Brown
    Brenda Brown May 28, 2011

    i've also been told it could be the transmission torque converter not engaging and disengaging right.

  • tim fredrickson May 28, 2011

    that was my next suggestion try a addiitive you can buy at auto zone cant remember the brand but is in a white bottle and wont hurt your transmission and is about 10.99 for the cost dont get anything that is cheap they wont work just make more troubles for you /by the way this stuff im talking about is real thick and red in color

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These sound like two seperate problems. The first sounds like a clogged fuel filter or faulty fuel pump. The second problem could be a bad transmission filter.

Posted on May 28, 2011

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