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Re: Serious Clutch Slippage (archive)

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Posted by Bran Kelly on September 13, 2000 at 15:24:44:

In Reply to: Re: Serious Clutch Slippage posted by G3 on September 13, 2000 at 11:52:36:

I'm not sure what exactly you are describing. If you could be a bit more specific, it would help. Also, what year and how many miles are on your car? You should be able to spin your wheels if you take the tach up to 3k rpms and drop the clutch in 1st. If you can't, your clutch is probably shot. I can spin'em at 3k rpm in 1st, however I do get some slippage in the higher gears at times, depending on the circumstances. Usually, it occurs when I make a particularly sloppy shift and fail to match the revs. I don't know if this kind of slippage is normal or not. It has done this since I got it (used w/ 30k miles). I've never experienced it on any other car I've driven.

It's a '98 with ~33K miles.
I think there is a certain type of slippage which is normal for the M3. The mechanic at the dealer explained to me the design of the clutch and I think he said that there is some type of flywheel which prevents the clutch from engaging at certain times (I'm not sure if this is a result of ASC or not). I was testing this again today and I can certainly get the tires to spin at >3K rpms, but if I rev the engine to somewhere at or above 4Krpms and modulate the clutch to get a fast start without squealing the tires, many times the engine will rev up to red line and stay there until the clutch gradually engages over time and the vehicle speed matches the rpms.
This problem is much more noticable with if it is under load (i.e. more people in the car, etc.).
I don't know if this is 1) the normal behavior of a clutch which is modulated the way that I am doing it, 2) A natural result of the ASC feature in the car, or 3) simply a bad clutch.
This is my first M3, so I have no point of reference much like yourself. I do know that I haven't experienced this sort of thing before with any other car that I've owned.

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