<VV> What Broke?

[Chuck Kubin]

Hey Nigel,
  Absolutely, I agree with Marc.  The noise is most certainly caused by something becoming dislodged and making contact with something else as it rotates, like part of the disk, pressure plate, thowout or a backed-out bolt. As the sound goes away when you depress the clutch pedal, look for a problem with the pressure plate, the disk, or  the throwout bearing.
  I'd fix this sooner or later to minimize damage to the other components, if you'd expect minimum wear on relatively new components. Otherwise, I'd prepare to replace the parts you'd change in a "normal" clutch job to keep from having to go in again later.
   
  Chuck Kubin
   
  
Marc Sheridan <sheridanma at adelphia.net> wrote:
  Nigel,

Before the experts chime in, I'll give you my somewhat educated guess. From 
your description, it almost has to be clutch related. The reduction of noise 
from adding oil is probably really just hopefulness on your part. My guess 
is it is the pressure plate or maybe the throwout bearing hanging up.

Sorry I can't back up my opinion with years of clutch work on Corvairs, but 
at least it is something to think about before the real gurus either agree 
with my analysis or rip it apart :o).

Marc Sheridan


From: "Nigel Hoyow" 
> Last night I was driving and suddenly a loud clack clack clack sound 
> started
> apparently coming from the drivetrain area. The clack gets faster as I
> accelerate.
> The engine is fine and the half shafts and stuff are okay. When I clutch 
> in
> the noise disappears and the engine revs freely with no apparent problem,
> but as soon as I put it back in gear it clacks from 1 through 4. I put 
> some
> oil in the box this morning (it took a quart) just in case but although it
> subdued the noise slightly, the clack clack clack is still there.
> I feel a metallic grounding rhythmic vibration just the moment when
> releasing the clutch and moving off - then the clack clack starts when I 
> get
> going.
> What do you think has gone wrong? Can you give me the bad news? a gear
> broke? gear teeth? Diff broke? clutch disc?
> The van drives fine except for the loud clacking sound. I parked it today
> just in case I break something else.
> Thanks for the help.
> Nigel - VW van 140/4 3.27 drivetrain.

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