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Old 07-09-2009, 01:06 PM   #76
ballabee1
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Default act clutch only

I think I have this problem as well but I didnt do the flywheel, just the clutch. Will only a new ACT clutch cause this noise to happen?
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Old 07-09-2009, 01:14 PM   #77
ragejed
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Quote:
Originally Posted by ballabee1 View Post
I think I have this problem as well but I didnt do the flywheel, just the clutch. Will only a new ACT clutch cause this noise to happen?
Seems so. I have act clutch and PP, OEM flywheel and I have the noise.
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Old 08-18-2009, 12:43 AM   #78
en3d
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For the guys that fixed the problem, when you say new OEM clutch and flywheel. Are these new from a Subaru dealership or from a vendor selling OEM spec clutch and flywheel?
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Old 08-20-2009, 02:38 PM   #79
Snowphun
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Quote:
Originally Posted by en3d View Post
For the guys that fixed the problem, when you say new OEM clutch and flywheel. Are these new from a Subaru dealership or from a vendor selling OEM spec clutch and flywheel?
Good question. I just had an "OE Exedy" clutch (not from Subaru) installed with the original cleaned up flywheel and after a few thousnad miles it sounds pretty bad, especially with the AC on. 80k+ miles over 8 years on the stock clutch, no noise at all.
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Old 08-20-2009, 04:49 PM   #80
kwan_1104
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Bought it from a Subaru dealership....
And apparently (in Canada only, i think), they offer "BRAND NEW" ones and remanufacured ones. But I got a brand new one.
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Old 08-22-2009, 05:51 PM   #81
eic20
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Default maybe same noises

I've got a 2006 wrx with 48k and blew out 2nd gear, I got lucky and the dealer rebuilt the trans. At the same time I had them put replace the clutch and flywheel with a act heavy duty pressure plate, modified street disc, and street lite flywheel. I put about 900 miles on it, it chatters bad from a stop and the vibration in higher gears at lower speeds is crazy, just driving through town its noisy. I've seen bad chatter from flywheels not being torqued down right but trusting the dealer, I'm hoping it was done right. In all my years of being a mechanic I usually don't see then this bad. I am about ready to put a new stock flywheel back in it. Ant Ideas???
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Old 09-15-2009, 06:41 AM   #82
fabzilla
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Hi!
Another member
what about changing the oil of the gearbox? eg from 75W90 to 85W90.. Someone tried this?

Last edited by fabzilla; 09-15-2009 at 06:57 AM.
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Old 09-15-2009, 10:33 AM   #83
davisk6
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Had my stock clutch replaced about 5K ago (2006 WRX, 70K) at the local dealer. They resurfaced my existing flywheel and, after break in, I discovered the same noise. No drive ability issues, just a bit unsettling. I also heard that newer revisions of the OEM flywheel are lighter than the ones produced back in 2006. But YMMV on that rumor. From what I can gather, even the slightest change in weight can cause this noise, even resurfaced OEM flywheels.
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Old 09-16-2009, 03:43 PM   #84
CrazyButHappy
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Just checking in with possibly the same issue:
2003 Subaru WRX with 95k had the clutch replaced with an Exedy "OEM" and my original OEM flywheel was resurfaced. I have the in-gear coast noise, light grinding noise sounds like tin plates rattling. This noise started right after the clutch job and only after the car is warmed up.
I checked the heatshields, took the car back to the shop... etc. Unfortunately I had replaced only one front half shaft at the same time. The shop claimed it was an imbalance between the worn shaft and the new one.
Currently I am at 110k and the noise hasn't changed.
Finally had the time to order a matching half shaft for the other side, I will also try the 3-4 psi tire pressure difference front to rear.

UPDATE: 33psi in the front tires and 29 psi in the rear tires took away about 75% of the noise. I am also going to have my tires rotated and then of course reset my front to rear pressure. I didn't have time to swap my one worn front drive shaft.

Last edited by CrazyButHappy; 09-21-2009 at 06:39 PM. Reason: Tried something and it works, sorta
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Old 09-21-2009, 05:54 AM   #85
REVNU
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Same issue here.

Exedy Stage 1
OEM Flywheel

It sounds like a rattling heatshield... but it's not. I guess I can live with it, I just turn up the radio louder.
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Old 09-25-2009, 04:59 PM   #86
fabzilla
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To give you more information: i installed an indigo 12lbs flywheel + exedy stage 1 clutch kit with a 5 speed tranny from MRT, + the STI Gr N engine and tranny mounts.
At the beginning the noise was present only after hard driving... then becomed more and more present.

Recently i changed the dead MRT tranny to a 6 spd STI gearbox, and the noise is awfull as soon as the car was warm.
I took the gearbox off and changed the clutch for an exedy stage 2, i also changed the pilot bearing in the flywheel.....it's worse

It seems that the vibrations frequency depends on the gearbox weight and gear cuts, etc...and that dampering assumed to be done by the flw is not efficient enough to filter the frequencies from 3500 to 2000 rpm
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Old 09-26-2009, 02:41 PM   #87
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i have a spec stage 2+ with a 10lb flywheel and mine sounds very similar to yours. my old clutch was slipping a lot so when i put the spec in i broke it in and had about a month after that of hard drving and quite a few track days. at first i though the shock from the new clutch messed up something in the Diffs or trans. i didnt notice the sound at first but now as soon as the car warms up, all kinds of hell is a good description. its just another odd thing us subie owners have to deal with.

i check my tire pressure once a week and that usually keeps it reasonable.
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Old 09-27-2009, 07:56 AM   #88
fast_lanz
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I had an exedy stage 1 with stock flywheel. Was hearing all kinds of grinding sounds when letting off the throttle mostly below 3k rpm. Clutch never felt right from day one. Engaged higher off the floor but figured this may be by design.

Put in a brand new stock oem exedy clutch with a new subaru sti 2004 flywheel supplied by the subaru dealership. "That flywheel is heavy". I would say at least 25Lbs.

Noise is gone and clutch feels 200% smoother and much lighter engaging. Now engages just coming off the floor.

Called exedy about the grinding noises and they said it's normal and apparently new stage one clutches have a paper explaining that grinding noises is normal due to heavy duty springs.

Very disappointed in original exedy stage 1 purchase as I had no disclaimer in my clutch when I bought it and it took me almost a year to figure out it was my clutch making all that noise.

Car is soooooooo much more enjoyable to drive..

Hopefully this helps others wondering what is going on....
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Old 09-28-2009, 04:24 AM   #89
fabzilla
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Well, I think I'm going to go back to stock flw and clutch, but I love the accelerations of the light one... they won't be the same with the OEM anvil

this noise is driving me mad
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Old 09-28-2009, 07:09 AM   #90
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I have the stock flywheel...but still have the noise ACT PP and disc tho.
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Old 09-28-2009, 12:04 PM   #91
Ryan314
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02 WRX.

Had an Exedy Stg 1 clutch and 14 lb. flywheel installed around 80k (few years ago) and I have been dealing with the obnoxious decel chatter ever since. Absolutely hate it. I regret putting this in 150%. If I ever need to pull the tranny off again both are coming off and being replaced with OEM.

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Old 09-29-2009, 04:33 AM   #92
fabzilla
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Does somone have the noise with a lightweight flwl but stock STI clutch ? I think the clutch is noisy because of hardened components....
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Old 09-29-2009, 09:41 AM   #93
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Quote:
Originally Posted by Ryan314 View Post
02 WRX.

Had an Exedy Stg 1 clutch and 14 lb. flywheel installed around 80k (few years ago) and I have been dealing with the obnoxious decel chatter ever since. Absolutely hate it. I regret putting this in 150%. If I ever need to pull the tranny off again both are coming off and being replaced with OEM.

Just put aside 6 hours on a weekend and DIY. I dropped mine twice in a year...first to put in the LW flywheel...second to take the damn thing out! haha.
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Old 10-01-2009, 12:41 AM   #94
punker39
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well i guess it was a good idea i did not take that deal on the light weight flywheel today when i bought my clutch, i guess ill be buying a stock flywheel then, thank you guys for being the test dummies for me and saving me from all the problems.
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Old 10-01-2009, 09:49 PM   #95
JRizzy24
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Just picked up my 2006 from having an ACT HD Clutch and ACT StreetLite Flywheel installed- noticed the sound almost immediately. Luckily, Jodie and Jake who installed it from RalliSpec both called me to check in and said that it was perfectly normal and to search out this thread.

Looking forward to learning how to drive my car all over again starting tomorrow
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Old 10-02-2009, 08:17 AM   #96
ragejed
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Quote:
Originally Posted by JRizzy24 View Post
Just picked up my 2006 from having an ACT HD Clutch and ACT StreetLite Flywheel installed- noticed the sound almost immediately. Luckily, Jodie and Jake who installed it from RalliSpec both called me to check in and said that it was perfectly normal and to search out this thread.

Looking forward to learning how to drive my car all over again starting tomorrow
You will be looking forward to putting the stock parts back in soon...as that noise will drive you nuts.
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Old 10-02-2009, 03:48 PM   #97
fast_lanz
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Can't tell you guys how much better the car feels and sounds with the stock clutch and flywheel compared to that exedy stage 1. Lived with the ggggrrrrrrrrrrrrrrrrrrrrrrrrrrcrunch crunch for over a year.. Freakin' ridiculous to the point I was going to sell the car cause I couldn't take it anymore.......
This is one upgrade I seriously regret as it was an expensive mistake...Doh!
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Old 10-02-2009, 11:03 PM   #98
2slofouru
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My car makes similar noise but it didn't do it for the first month or so after my swap. Exedy LW flywheel and exedy "stage 1" clutch kit:


No way that is supposed to be happening
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Old 10-04-2009, 10:03 AM   #99
hatchd
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Quote:
Originally Posted by jacky599r View Post
Hi,

Ever since i did a jdm 6 speed swap, the NVH has increased significantly. i have unabomber sexy rear end, grp n engine and tranny mount, tranny cross member bushing from tic. The thing is, i have all the items when i had the 5 speeder and i DID NOT encounter the same NVH. This is a new thing ever since the swap so i dont really think it was attributed by the bushings. Anyhow, you will notice that during acceleration and decceleration @ 2000 - 3000 rpm, theres a distint loud chatter and grinding sound, it seems to come underneath from the shifter as well as the rear end of the car. Im at my ends and i wan to solve this real bad!
Can a clutch kit cause this kinda noise?
Also, attached is another video of slow speed turns. Also noticed that theres a knocking sound. No idea if its the diff or cv boot / cv joints breaking up on me. It is strange this only happens during slow speed turns...

http://s68.photobucket.com/albums/i1...rrent=NVH1.flv
I have basically this same problem and it sounds very similar to this video. It's in an 02 WRX with stock tranny and clutch/flywheel. I've noticed a couple oddities with mine:

1. Mine does it on accel & decel. When accelerating it seems to be worse right when I push the clutch fully in and shift gears.

2. It happens a lot more when under load, ie. if I'm cruising in 4th gear around 30-35mph (around 1500-2000rpm). If I try to accelerate, say to go up a hill or something, it happens almost 100% of the time.

3. Happens more frequently when going around turns.

4. Happens when car is in neutral and and I rev the motor. I had it in my garage trying to figure out wtf it was and when it was revved up around 2k rpm it starts to rattle probably 75% of the time. Sounds really bad sometimes when rolling in neutral (gf's driveway is a steep incline, no need to reverse out of it).

If this is normal, I'm about ready to sell the car and go back to a Honda lol. Anyone have any ideas?
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Old 10-04-2009, 11:51 AM   #100
lil'redwagon
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it sounds to me that it's the clutch, not the flywheel. has anyone gone back to oem clutch but kept the lightened flywheel?
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