Murphy's noise

[Gordon C Hyde <gohyde@domain.elided>]

Rob wrote:
>I didn't get many responses to my query about a vibration noise I hear 
>when I slightly lift on the throttle.  I got one response saying it may
be 
>coming from the u-joints, however, I had these replaced about 2 months 
>ago , so I hope it is not them.  How about the driveshaft support? 
Isn't
>there a bearing there?  Could this be bad or loose or something?  
>Are there any tell-tell signs of this center support going bad?  

I didn't respond initially because I figured someone more knowing might,
but let me take a stab.  My center support bearing is going bad, but it
only vibrates upon driving away from a complete stop.  Your describe your
sound as happening whenever you lift - my guess is that the exhaust is
rattling against something.  My Spider does that, especially decelerating
down a hill at about 1500 rpm.  I put it up on a hoist, and could not see
any sign of damage, and even adjusted the multiple connections in the
exhaust system.  There was some improvement but there is still an
occasional rattle.  Rob, I wouldn't be surprised that you have a similar
problem, perhaps even because of the u-joint replacement and any slight
adjustments that might have been made at that time.

Gordy Hyde
1987 Spider
NWARC
Seattle, WA  

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