Re: Please Explain A4 2.8 Driveline Shudder

[Andy Poling <andy@realbig.com>]

dan_masi@MENTORG.COM (Dan Masi) sez:
> On Dec 10, 10:08am, tlazay@ultranet.com wrote:
> > Subject: Please Explain A4 2.8 Driveline Shudder
> > I've been following this discussion for a while and I can't
> > reproduce the same engine phenomenon. Maybe I'm not looking for
> > the right thing. Could somebody give me an idea of what exactly
> > to look for to identify this problem. Many thanks.
> 
> I don't remember what range of rpm causes it, but here's
> a loose description.  You're in 3rd gear, pedal to the floor.
> You do a fast shift to 4th, again floor the pedal as you
> come off the clutch.  At that moment, the car develops
> the shudder.  It lasts for about a second, and feels as
> though the clutch is alternately slipping and grabbing, or
> as though instead of actually hold the gas pedal all the way
> down, you were fluttering it at a rate of around 10 pulses
> per second.
> 
> Does this sound close, to others who've experienced it?  It's
> definitely a resonance set up somewhere, whether mechanical
> or electronic.

Yep - that's it.  What I find disconcerting is that the car actually surges
forward (and not forward) the shudder is so strong.  I mean you feel it as
much in your back as in your backside.  It concerns me because it is so
strong...

-Andy

'91 Miata: "ZIP"          '96 A4 Quattro: "ZOOM"       '84 Yam RZ350: "ZING"