Originally posted by bills69:
can shakers go bad?
Wow - good question.
As "JohnZ" discribes, and is in this and other 'cocktail shaker' posts, they are filled with ATF. The fluid is not subjected to friction, high heat or contamination as is the case with other fluid applications in the vehicle so it should not "wear out".
I would have to think the springs would be the only thing that could change, or break, that would effect their operation. I have never found a "bad" one - just cars without them that have the common 'cowl shake' much worse than normal.
I would recommend you check the wheels and tires carefully for run-out and balance.
After replacing all the body mount bushings in mine I had a four wheel thrust alignment done to be sure I got the front and rear wheels all "co-operating" in getting the car down the road straight.
Replacing the body bushings (with OEM type) did help with road isolation to some extent. You may want to inspect yours carefully, they may be so old and hard they are not helping anymore.
I would also recommend you stay away from "Poly" bushings anywhere in a convertible if you are worried about ride and road noise.
JMHO - hope others chime in with comments/suggestions.