I've actually been suggested a Competition Clutch to replace my ACT. Something's wrong with my clutch. Whether it's the throw out bearing, the slave cylinder, or whatever, i don't fuggin know. I don't feel like playing trial and error anywayz. I've adjusted the ACT till there is no more room left to adjust and I haven't had smooth shifting since I've bought it. Shop here tells me it's just as good if not slightly better than the exedy. But I dunno, i haven't really heard anything about these clutches.

 

Alright, well here is my thoughts on all of this. When the clutch is out you can hear the tob chattering and you can feel it on the clutch pedal and when you engage it it goes away (this is definetly a tob problem but oh well not the end of the world). This is what gets me. You say that you pump the clutch and it gets all of its pressure back then it goes away. That definetly says that there is some air in the line because you are losing pressure at certain points of driving. My TOB Chatters right now as well, but you know I have had 2 evos and both of them had tob chatter from the factory this is a normal thing for them however I am not going to say its to the point to where I can feel it in my pedal, I can definetly hear it though. ACT Is a great clutch company, I have run the 2600 in all of my DSM's. I know that we are dealing with a different beast here but I am going to be going with the ACT as well for my evo. They are normally pretty reliable clutches. I had the 2600 in my 430 whp talon for 40k miles and i finally blew the tranny before the clutch, pulled the clutch and it still looks good haha. Anyways point being this. TOB Chatter is one thing, Clutch pedal pressure is a totally different thing. The question here is this. If you get on it does your clutch slip? (RPMS go up but Speed dosnt)

Sorry for blabbing on

 

Sounds like the TOB came off or something.

 

same thing happened to my friends evo it was the slave cylinder,but i would definitly save up for the exedy clutch in me exprience the act dont last long.the exedy will last much longer.

 

tob didnt come off it still drives. however something is causing air to get in the line if what he described is happening.

 

check the fluid level on the master cylinder (the clutch one obviously)

 

you have air in your clutch line. how it got there is beyond me but most likely they left your slave cylinder half of the master cylinder resevoir low when they did your brakes. and after a long time of driving you finally caught a bubble and this bubble made its way down.

this would most likely cause some vibrations when the vacuum is high (high way cruising) and causes you to lose pedal pressure.

this also likely does not keep sufficient pressure on the throw out bearing when the clutch is fully released, which is why you have vibrations.

all you have to do is bleed the clutch line.

notes on bleeding the clutch line. it's not easy, or rather it's TOO easy and you're gonna muck it up cuz you're not paying attention.

the slave cylinder resevoir is VERY SMALL and it is INSIDE the master cylinder resevoir. so you MUST keep an eye on the level, a couple clutch pumps and IT'S EMPTY, as in you're sucking in air!!! SOOOO keep filling, keep filling, keep filling. fill after EVERY pump if you have to. or better yet get a power bleeder and you don't have to worry about it.