RE: thump-thump-thump

["Lewis, Gerald" <gerald.lewis@domain.elided>]

>Date: Tue, 23 Nov 1999 18:54:45 EST
>From: "Wallace Martin" <sallgdon64@domain.elided>
>Subject: Spider drivetrain shutters when slowing to stop

>Recently encountered the strangest problem on my 1984 Spider Veloce:

>When coming to a stop with the car in gear and clutch depressed, as the 
>RPM's fall to about 1000, I get a rapid "thump-thump-thump" from the 
>rear/underneath area, and the engine begins to stall.  The shuddering then 
>stops and the engine RPM's return to idle.  The behavior the same when 
>stopping with the car in neutral and the clutch disenaged.

Before changing the clutch check the rear engine/transmission mount. Failure
here can also cause quite a bit of thumping..

Jerry in Houston

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