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Re: Please Explain A4 2.8 Driveline Shudder
dan_masi@MENTORG.COM (Dan Masi) sez:
> On Dec 10, 10:08am, firstname.lastname@example.org 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
'91 Miata: "ZIP" '96 A4 Quattro: "ZOOM" '84 Yam RZ350: "ZING"