Under hard acceleration (0-60, 1/4mile etc.)

[nenad]

Under hard acceleration (0-60, 1/4mile etc.) I noticed clutch-sliping kind of effect, when upshifting from 1st to 2nd. Its as if I hold the clutch half way down for 1 sec or less. Is this normal. My car is 99 M3 with 30km. This happens even with ASC off. Dealer says clutch is ok. Please help!:

[XOC]

This sounds like what I was trying to describe a while back -- do you notice it when you do a very fast shift - like it doesn't lock into the lower rev right away, but sort of eases into it even though your foot is off the clutch? That's what I've been noticing, and I just had a new clutch installed about a month ago.

[///M3-=FiN=-]

The same this is happening to me, but not only my 1st to 2nd gear, its also my 2nd to 3rd gear that is slipping. I am looking right now to buy a new clutch kit, and while I'm doing this I might as well put in a LTW flywheel as well. But after reading the post, sounds like even changing out my clutch might not work....hmmmmm :

[michaelab]

I remember reading on alt.autos.bmw that the clutch 'guibo' can cause this. Don't know what a guibo is other than that it's a rubber disc which is part of the clutch assembly. No idea what it does though.

Someone with more technical knowledge on clutches will have to answer that one.

Michael.

[Josh///M3]

Guibo is evil. I had mine replaced. Its a little plastic piece that connects something to the tranny... i think its around the driveshaft or something. Mine was cracking and if it let go the driveshaft would go flying. BMW did this under warranty. I replaced my clutch, flywheel, and pressure plate (sachs sport clutch disc, all else stock) and the car sticks MUCH better. It might be a number of things, but i don't recall my 96 doing that. My friends 99 if i recall right was fine with the clutch.

Get it checked out soon,
Josh

[Brett]

i belive thats the same as the "flex disc" which i just got replaced when they put in my new clutch.. it was about $100 for this.. my old one was all cracked. =(

-Brett

[tampaturbom3]

yes, the guibo goes between the tranny output shaft and the driveshaft. it is designed to soften the shock a little to the DS. it has nothing to do with the clutch. i have deystroyed a guibo too.
when i bent my drivshaft, my guibo was no longer in a circle shape.

[///M3-=FiN=-]

Does anybody have any pics of the clutch Guibo, or the exact location of it?

[TurboBMW3]

Heres the picture of a flex disc