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I searched around the board but couldnt find anything - i have a 05 model 3.0 auto. At about 25 percent throttle, in 1st or 2nd gear (probably 3rd and 4th also - just too much road noise to notice), i can hear a pretty bad knock from the motor. Its only on acceleration and quite annoying. Im wondering if there is something seriously wrong.
45k miles, 3.0, auto, synthetic since day one... The transmission is an EXTREMELY slow shift from 2nd to 3rd, and somewhat 3rd to 4th as well, but thats another issue (after a full synthetic amsoil flush, no difference). Just curious if anyone has any ideas. I need the car to last to 100k at least (even though I only drive 10 miles max a day during the week).
 
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