derangedazn

iTrader: (3)

I am having similar problem but upon acceleration. From Idle to acceleration (In 1st) I get a wierd vibration from when the clutch engages to when I let off the clutch. The noise can be described as a dragging or "Coffee Grinder" noise. I can feel it on both clutch pedal and gas pedal. The noise seems to come from the Front driver side area (or at least that it seems to be coming from when driving).

This does not occur on a regular basis...but I notice it in 1st, 2nd, and sometimes 3rd...sort of random.

I have ACT HDSS Clutch, Streetlite Flywheel, and basic performance mods (TBE, MBC, FP, and Flash).

Is this normal or something I need to be concerned about.

matt55

iTrader: (12)

Bump
Any news on whats going on ?

gonzo6150

Still waiting for the dealership to finish with the tranny. I will post as soon as I have my car back!!

steevo

iTrader: (3)

Maybe they will find something, but if they don't you should be fine. Mine has been making the exact same noises you describe for 22k miles. It's normal. Enjoy your Evo when you get it back. Oh, and I used mine for my PC business as well, but quickly learned to buy us a cheap, reliable business car. Not much fun putting those kind of miles on the Evo, they could be used much better..

gsrboi80

iTrader: (38)

Same here 25k on my HDSS Decel Noise Mod FTW

gonzo6150

Update.

I got the Evo back after having the tranny serviced. The dealership found a bad input shaft and a bad 5th gear, which was replaced along with a few bearings and seals. There was a service bulletin issued in regards to 5th gear and the input shaft, but I didn't say anything about that. ;-)

The coffee grinder noise is still there tho. At this point, from everyone's feedback, I guess it's not going to hurt anything. I wish there had been some type of warning or disclaimer that ACT could have supplied with the clutch kit that would let a consumer know that the clutch and flywheel may make unusual noises. It would have saved me a lot of headache and worry.

Since this is my first time putting an aftermarket clutch and flywheel in a car, I guess I'll just chalk it up to experience.

-Brian

sabastian458

iTrader: (25)

I have the ACT HD w/ prolite and I have the excat same noise. I also get 2nd gear lock out when under hard accel. I have replaced the throw out bearing 3 times, and rechecked the torque on all the bolts and it is still there. I am just learning to deal with it.

matt55

iTrader: (12)

That sucks man , Ive been watching your thread closely b/c iam growing very tired on the clutch de-cell noise and i was looking for a quiter replacement for my loud twin . I dont understand how some cars have no noise but some do with same clutch .

So iam wondering if its the flywheel's fault more than the clutch (not enuf mass/noise dampering?) .

gonzo6150

At this point, I don't know. I think Actman would be the best person to answer that question.

Jeff_Jeske

iTrader: (66)

I admire your positive attitude but I have to speak up and say that properly working drivetrain shouldn't sound like a coffee grinder.

It may not even be the clutch. Mitsu techs are notorious for half arsed work especially on EVOs. Also keep in mind the car is used with an unknown history.

I haven't been the biggest fan of ACT due to a different issue on a different car but serveral of my EVO buds have gone with the ACT clutch and flywheel and all of them have had great success. No engagement, noise, or performance problems at all. I'm half temped to give ACT a second try myself.

If it were my car.... I would find the source of the noise and correct it before worse things happen.

shivaswrath

iTrader: (9)

it's probably the lightened fly wheel that is exacerbating the noise, since i have the same clutch with the stock flywheel and no problems. . .that's the problem with those light flywheels. . .accentuates most clutch chatter. . .

ACTman

iTrader: (5)

Please review my earlier posts regarding noise and how it relates to flywheels, mods, torsional vibration, etc... There are a lot of variables that contribute to this type of noise which is why it is not the same on all EVOs.

The bottom line is that the torsional vibrations from the engine have an increased tendancy to make the gears growl as:
1. The performance goes up - higher boost, timing, cams, etc
2. The rotating mass goes down - lighter flywheel, pulleys, engine internals, etc
3. The disc dampening springs are too strong, or possibly too weak depending on the noise.
4. The dampening of the stock front dampener is changed.

Disclaimer: Once again, I don't have the car here to listen to so certain assumptions are made as to what the "coffee grinder" sound is like and how loud the noise may be.

mump

iTrader: (46)

I have the ACT HDSS with a stock flywheel and have the coffee grinder noise, my guess is that it is the clutch. Had the noise for over a year now.

ACTman

iTrader: (5)

If you have had it for over a year, the disc center is an Exedy design. Unfortunately Exedy won't sell their OE discs to the aftermarket because I like the center section of the earlier OE EVO discs. We changed to our own parts about 6 months ago to use stiffer springs and stronger components for more durability/longevity under high power. Honestly I am not sure if the noise is better or worse now, but it is more bulletproof than before. Don't get me wrong. I am not trying to dog the Exedy discs. They have proven to be very reliable and we sold them for years.

EV0lved

i was just about to talk to someone about this as well, i had a ACT street clutch kit and streetlite flywheel( i assume this is the 2600 lb kit?) put in my 03 evo along w/ a new 2nd gear synchro and a tranny flush w/ BG synchro put in about 3 months ago, having the same noise you guys are describing...that grinding sound although mine only comes on when i downshift into 3rd above 4k and continues down to around 3k rpm, i can also hear it in 2nd gear a little bit from around 3500 rpm but barely noticeable i only get this grinding noise when im downshifting, im wondering if BG synchro fluid has anything to do with this, i though it was a lighter weight oil vs. stock and its not thick enough to muffle synchro noise? im playing a guessing game here, but it sounds bad, and i dont want to buy a new t-case or tranny if something happens, i hope its just the clutch,i looked at it myself, and ive taken it back in to have it looked at but the tuner shop i took it to said they found nothing on the inspection(very reputable shop too, they work on alot of dsms/evos)