Question about 2004 Ford Expedition

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Clunking noise w/ acceleration

Maybe you can help me...when I am decelerating around curve and then start accelerating, I have this clunk in the engine. I was told that the drive shaft needed to be lubed but this was done in past and did not help. Any ideas?

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  • brentlo Aug 24, 2008

    It feels like it is down shifting and when you push the accelerator it trys to catch up with that gear....it is more than a noise, I can also feel it. It happens when turning to either direction or going down a hill and back up hitting accelerator.

  • Randy Harkins
    Randy Harkins May 11, 2010

    are you sure its in the engine? I am more inclined to believe its in the suspension like a bad ball joing or lools control arm bushing. because you say it only happens when you are in a curve which direction does it happen or is it in both directions Its unlikely its in both directions and open the window to make sure its not in the rear you may need someone to sit in the back seat and hang their head out the window to listen

    If this information helps please give me a fixya rating and keep in touch with me if I can be of further help in this area

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  • Master
  • 335 Answers

Ya know it sounds like one of the U-Jonts in the front drive line to the front wheels has failed or even one of the driveline U- joints is either Dry and lost its bearings and is worn out,
One of the easiest ways to make sure its not the engine is while driving down a hill put the car in neutral, turn off the engine coast down a small hill and turn to either direction and see if you still hear it , if you still hear it its gonna be somewhere in the drive lines, becareful you will not have power steering or power brakes with the engine off, but you can restart the engine inn neutral at any time . Please let me know.

Posted on Aug 25, 2008

  • Randy Harkins
    Randy Harkins Aug 25, 2008

    The reason I say do this with the engine off is when you accelerate you are putting strain on the drivelines and thats mostly when you will hear a bad U-Joint

    Oh I forgor is it continuous as long as you are accelerating or a one time thing? like a
    Thump then it's gone

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