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Originally Posted by TheClarkster
As a followup to my problem:
The car vibrates noticably(sp?) only while driving. Revving the engine in park does not cause vibration at all. The vibration is bad when going somewhere around 30 mph and gets very bad while coasting at those speeds. The vibration reduces by a bunch if you shift it into neutral at those speeds though.
Any more ideas or diagnostic tests we could do?
Thanks
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I believe you may have a bad second gear, or on an auto, a bad two-three accumulator. This is what happens when you're driving near the speed at which the transmission shifts: a seal wears out in the accumulator, the drop in pressure druing the shift can cause it to shift back into second, which kicks the pressure up, making it shift into third, which drops the pressure halfway through the shift, dropping it back into second, and so on ...