1997 Buick Park Avenue Shifting gears

1997 BUICK PARK AVENUE
12,000 MILES • 6 CYL • FWD • AUTOMATIC
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BOBAJEN
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My Park Avenue seems to have a very smooth transmission as it goes though its gears but every now and then it just changes and you can feel every gear as it is shifting. it gets to the point where it is a rough shift to the next gear.
It also seems if you stop and let it cool for a short period that it then shifts smooth again. Ideas?
Mar 28, 2010 at 8:47 PM
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JACOBANDNICKOLAS
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Is the trans fluid full and clean?
Apr 7, 2010 at 8:36 AM