Question about 1999 Ford Expedition

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1999 FORD EXPEDITION

WHEN I GIVE IT GAS IT HAS A THUMPING GRINDING KIND OF SOUND UNDERNEATH BUT WHEN I LET OFF IT USUALLY WILL QUIT. ALSO AS LONG AS I HOLD A STEADY SPEED IT DOES'NT DO IT BUT IF I COME TO A HILL AND GIVE IT GAS IT STARTS TO DO IT AND IT FEELS LIKE SOMETHING IS HOLDING YOU BACK

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  • aneimajpaint Nov 22, 2008

    if the auto transmission is going out what other symptoms will occur. My 1999 expedition is doing same thing but also terrible noise when I turn. It makes a grabbing, popping sound when I accelerate. Had the fluids changed and the filter, had the back u joints changed. Could it be the driveshaft or the other back set of u joints?

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Sounds like you need new rotors or breaks on your car, have they been inspected or changed in the last service? Probably worn down to the point your breaks are grabbing.

Also could be the automatic transmission giving out, due to worn bands and cylineders.
Could invest 100$ in a tranny flush with synthetic oils, exp if miles are high, 100,000 +

Posted on Sep 11, 2008

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