Do any of you with the Exedy Organic Racing full face clutch get clutch chatter when the car is cold? I get it pretty bad sometimes, but after 5 minutes of initial driving the clutch grabs hard like normal. I was under the impression that the more aggressive faces are the ones that have chatter problems. Or am I wrong? Is this normal? I broke in the clutch for at least 500 miles city driving, taking it easy never revving higher than 3-4k if possible. Not really a bother to me, but just kind of concerned.

 

I know you said you have an Exedy clutch, but I found this useful info on ACTs site a while ago when I was experiencing clutch chatter.

possible reasons for clutch chatter:
- Flywheel has excessive run-out.
- Flywheel was not resurfaced or improperly resurfaced before the new clutch was installed.
- Damaged or excessively worn CV joints.
- Bad U-Joints in drive shaft or U-Joints misaligned.
- Excessive backlash in differential.
- Excessive driveline angle.
- Bad leaf springs, bushings or mounts.
- The use of an aggressive clutch disc designed for racing.
- Defective pressure plate and/or disc.
- Disc has inadequate Marcel (Not enough cushion between the friction facing.).
- Oil or grease contamination on clutch facings.
- Worn or damaged clutch linkage.
- Bent pressure plate assembly and/or disc.
- Improperly tuned engine.
- Worn or damaged engine mounts or transmission mounts.

 

thanks for the info. Yeah I've read that when i was doing a search on chatter. But if any of those reasons were a reason for chatter, wouldn't the chatter be consistent and happen everytime you try to engage the clutch, and not just when it's cold?

 

Have you checked the troubleshooting section on Exedy/Daikin website? Who installed and new or used re-surfaced fly wheel?

 

thx for the suggestion, their troubleshooting manual is VERY thorough. pretty badass!

Autolink Motorworks of Temple City were the ones who installed the clutch and resurfaced the flywheel when I had my swap done by them.

again, is serious clutch chatter as a result of any of those symptoms a consistent problem? or is the chatter apparent only at cold operating temperatures?

 

yeah i've noticed that in the recent mornings it has a slight chatter but then again i expect it since its really cold. have to melt ice off my windows recently and its probably from my not doing my footwork right at 7am, i have to keep telling my self to push the accelerator

just put the clutch in last summer with a new itr flywheel, hopin my flywheel isn't warped?!

 

Here's a question for you: Does it get worse just before full engagement, when the engine and transmission are almost at the same speed?

If so, this could be an example of "negative gradient chatter." The facing material is designed to have a certain friction coefficient, and it is supposed to be about the same no matter what the slip speed is (the difference in speed between the engine/flywheel and disc/transmission) - but some cheapo facings, particularly when cold, have what's called "negative gradient" friction coefficient - which means that as the slip speed increases, the friction coefficient falls off - and if you graph that as a function of slip speed, the slope, or gradient, is negative.

Bad news for you is that if this is the case, the only answer is to replace the disc, or at least the linings if you can get new ones. But try to eliminate other possibilities first.

 

interesting info but the chatter is about the same.

 

Dude, I had to read your post a second time around. Very interesting perspective.

 

blah the chatter has gotten worse now. Anyone with exedy organic have chatter?