clutch chatter, funny engagement

[brian89gp]

284 tranny, CF dual friction clutch.

The clutch starts to engage just slightly off the floor, at about 75% up it just goes fully engaged. Inbetween just off the floor and that 75% it is like the clutch is barely enaged (enough to move the car on flat ground but not a hill), when it hits 75% pedal it does an on/off thing. Is this normal for this type of clutch?

Also, can someone tell me what this sound is. Keep in mind that I really don't know how to drive a stick yet and the foot cordination is not down yet. If I press the clutch too soon and my foot isn't off the gas yet (the engine revs a bit when the clutch disenages) I get this metal on metal vibration sound and the pedal vibrates. If I shift it correctly and have my foot off the gas before I press the clutch it doesn't do it. Also it will only do it if the engine RPM is above 2000 or so.

[bwawuz02]

that sounds really weird. when on a hill the car needs more power to go forward, thus engine rpms must be higher when letting the clutch out. sorry if you knew that already. i bet it has something to do with removing the slave and installing that steel braded line. might wanna try some new clutch hydraulics. then again, that thing is so far from stock it's hard to tell.

[jmgtp]

Re: clutch chatter, funny engagement

284 tranny, CF dual friction clutch.

The clutch starts to engage just slightly off the floor, at about 75% up it just goes fully engaged. Inbetween just off the floor and that 75% it is like the clutch is barely enaged (enough to move the car on flat ground but not a hill), when it hits 75% pedal it does an on/off thing. Is this normal for this type of clutch?

Also, can someone tell me what this sound is. Keep in mind that I really don't know how to drive a stick yet and the foot cordination is not down yet. If I press the clutch too soon and my foot isn't off the gas yet (the engine revs a bit when the clutch disenages) I get this metal on metal vibration sound and the pedal vibrates. If I shift it correctly and have my foot off the gas before I press the clutch it doesn't do it. Also it will only do it if the engine RPM is above 2000 or so.

sounds: the 284, I think, chatters a bit just from spinning (like in neutral with clutch engaged you can hear it spinning somewhat, not excessive... more noticeable if youre parked against a wall type thing) or TO bearing could be bad and is chattering (I think if its really bad it will make a knock sound -just like my 282 does!). BUT... I've never experienced a sound as you described "metal on metal" from disengaging the clutch before my foot was completely off the gas. Could be that something is loose in there? Remember Nico? He had his flywheel break loose because he neglected to use loctite on the bolts (he claimed) and the clutch got stock engaged. Maybe a flywheel bolt or something of that nature has loosened? -just an idea.

My cluth starts to engage a little bit off the floor and progressively becomes more engaged the more I let it out and by about 75% out it feels fully engaged and wont slip. I'm thinkin maybe you have some bad hydrolics. The line you installed is prolly ok but maybe slave or master are bad. I have vibrations in my clutch pedal too. Not like you described with the letting off the gas too late though. If I just touch the pedal with my foot while the car is in motion I can feel vibrations through it and if I let off the gas (like go from accel to decel) with my foot just touching the pedal I can kinda feel a "bump" in the pedal. It did it with the clutch that was in the car when I bought it 5 years ago and the clutch that I replaced it with right when I got it still does it to this day.

[brian89gp]

Its not like a high pitch squeel, it is a low tone that is barely audible.

My clutch from just off the floor to 75% feels like the same engagement, not progressively more like you would expect. Its like 5% engaged up to 75% pedal, then it goes to 100% engaged. Its more annoying then anything. I have a spare slave here that I might try out at a later time.

I used locktite on the flywheel and pressure plate bolts. I'm just going to drive it until it starts getting worse, but it is still quite annoying not knowing what it is.

[Anonymous]

My 284 doesn't chatter at all. But a chattering is typical of a bad throw-out bearing, which tend to go out really soon in the 284. But C/F makes damn good clutches, I'd assume they also use good quality T/O bearings.

[jmgtp]

My 284 doesn't chatter at all. But a chattering is typical of a bad throw-out bearing, which tend to go out really soon in the 284. But C/F makes damn good clutches, I'd assume they also use good quality T/O bearings.

my throw out bearing has been going for 5 yrs. They go out fast when people who dont know how to take care of them sit in gear at lights. I can hear my trans spinning in neutral, I think anyone with a 5 speed manual any make can. The trans is spinning so long as the clutch is engaged and the 284 isnt the quietest unit.

[Anonymous]

I've heard that chattering is fairly normal for the 284s. The rattling sound is from the gap inbetween the gears so that when they heat up and expand, they dont bind on each other. (Not 100% on that though)

[brian89gp]

I think I blew up the disc, will know more this weekend when I pull it out yet again