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Old 02-02-2010, 11:58 PM   #26
txl146
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That's interesting - mine sounds like scraping/grinding noise that is somewhat rhythmic. I can also feel vibration from the floor when that happens. Once foot is back on the gas or clutch depressed, noise goes away...

Looks like problem is due to resurfaced flywheel...

http://forums.nasioc.com/forums/show....php?t=1097682
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Last edited by txl146; 02-03-2010 at 12:29 AM.
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Old 02-03-2010, 02:26 AM   #27
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I have a street light flywheel and exedy clutch and mine didnt make any noise at all. The minute I changed my tranny though..i have the same noises as you.
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Old 11-23-2010, 01:48 PM   #28
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I just had my original clutch replaced in my '03 WRX sedan at 131K. Because I waited so long the flywheel could not be resurfaced and had a nice groove in it. Also, my mechanic discovered that the U joints on the prop shaft were really worn, so I had that replaced.

I got the Exedy OEM replacement clutch from Amazon for $146.50 free shipping, the OEM Flywheel came from the stealership for $280 - because I didn't know I would need it for sure- and the rebuild of the prop shaft u joints cost $490 plus $750 labor for the whole thing.

At this point I started hearing the noise exactly as described in this amazingly old thread. Only on deceleration while in gear. Clutch in - gone. Neutral - gone.

I never used to have it so I was worried that there was something going on with the new clutch. I am definitely glad to hear it is most likely nothing and I will check the bracket mentioned above to see if it was bent.

How much effort is it to replace it? Just looks like a few bolts.

Also, just before I replaced all of the above, I noticed a gear whine when the car was cold and when I was accelerating while turning. That has not gone away after all that work and now I need to track down what that could be.
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Old 03-16-2011, 09:23 AM   #29
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Could it be the center for front diff bearings?
I have the same sort of noise, it could be the flywheel I had machined
from an unknown year.
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Old 11-26-2012, 10:27 PM   #30
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delete

Last edited by cspark0; 01-12-2013 at 10:00 PM.
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Old 11-27-2012, 11:58 AM   #31
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I have an 02 WRX with 186k km's on it. Been doing this sound since 170k km's. When I had my motor done they did the clutch and resurfaced flywheel and it got louder. I also did Group N motor mounts and have all the bushings done in the back (outrigger, diff mount, diff lock) so I expected more sounds.

One of these days i'll pull the outrigger bushings and see if it improves, and possibly grab a new OEM flywheel as well.

Yours sounds a little worse from the description anyway, but I was only able to find one person to document a failure with a similar sound and I believe he had found the first bearing at the front of the trans was the culprit. (he also had shavings in his trans fluid which after 3 changes I have yet to have).

Search my name and you will find a video I made last yr.
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Old 11-28-2012, 08:12 AM   #32
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Pilot bearing... Check this running thread... forums.nasioc.com/forums/showthread.php?t=2408482
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Old 11-29-2012, 11:50 AM   #33
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Quote:
Originally Posted by Aaron'z 2.5RS View Post
Pilot bearing... Check this running thread... forums.nasioc.com/forums/showthread.php?t=2408482
+1
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Old 11-29-2012, 07:16 PM   #34
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It's a known fact that the trans will make a noise under deceleration with a lightened flywheel. I have been down this road on my own car every since I swapped everything. I did everything from swapping transmissions to a couple different aftermarket clutches and flywheels. Out of three different transmissions the only time it went away was when I put a stock flywheel back in. I did however get completely lucky when my spec clutch finally went with my stock resurfaced flywheel I bought an act 6 puck and a street light flywheel (first flywheel I noticed the noise) and now it's totally quiet.

Chances are if you just had your stuff done and running a lighter then stock flywheel this noise is because of that. If you've had this set up for a while with no issues before and it sounds like Aarons vid then you probably have an issue.
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Old 12-01-2012, 01:22 PM   #35
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Quote:
Originally Posted by Supraru View Post
It's a known fact that the trans will make a noise under deceleration with a lightened flywheel. I have been down this road on my own car every since I swapped everything. I did everything from swapping transmissions to a couple different aftermarket clutches and flywheels. Out of three different transmissions the only time it went away was when I put a stock flywheel back in. I did however get completely lucky when my spec clutch finally went with my stock resurfaced flywheel I bought an act 6 puck and a street light flywheel (first flywheel I noticed the noise) and now it's totally quiet.

Chances are if you just had your stuff done and running a lighter then stock flywheel this noise is because of that. If you've had this set up for a while with no issues before and it sounds like Aarons vid then you probably have an issue.
So I ask... When the problems started, was it right after a SPEC clutch install??

You say a "couple" of different clutches, but did you swap out the pilots bearings each time, or did you re-use the one you orrigionaly installed with the FIRST clutch..??

You say you got "lucky" when your SPEC clutch went... was that the "final" try at the clutch, or was that the original replacement?

Cause I had a perfectly working Exedy (besides the high RPM slip) in the car, made ZERO noise (on the same Exedy LWFW)

Then I put in the SPEC.... and all hell broke loose...

Removed the SPEC and installed a NEW verson of the SAME Exedy and have yet had a slip issue (the flywheel was cut wrong on the first Exedy)...

"I" don't believe it's "normal" to have that noise what-so-ever...
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Old 12-01-2012, 06:11 PM   #36
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Quote:
Originally Posted by Aaron'z 2.5RS View Post
So I ask... When the problems started, was it right after a SPEC clutch install??

You say a "couple" of different clutches, but did you swap out the pilots bearings each time, or did you re-use the one you orrigionaly installed with the FIRST clutch..??

You say you got "lucky" when your SPEC clutch went... was that the "final" try at the clutch, or was that the original replacement?

Cause I had a perfectly working Exedy (besides the high RPM slip) in the car, made ZERO noise (on the same Exedy LWFW)

Then I put in the SPEC.... and all hell broke loose...

Removed the SPEC and installed a NEW verson of the SAME Exedy and have yet had a slip issue (the flywheel was cut wrong on the first Exedy)...

"I" don't believe it's "normal" to have that noise what-so-ever...
No these set ups were all in different transmissions and set ups.

Set up 1: 04' Wrx trans, Act street clutch and street light flywheel
-This set up really bugged the **** out of me. I had just swapped everything and in my stock Rs trans and then the 05' legacy non turbo trans swap (first one ever completed) I ran a 9lb fidanza flywheel and not once ever had a decel noise like this one. This had be believing I had an issue with my trans.

Set up 2: 03' wrx trans with spec stage 2.5 clutch and spec lightened flywheel. Basically still had the same decel noise. Now I knew my 04' trans was still good and the issue had to have been somewhere in having the lightened flywheel. There was a special note I took into consideration. When I installed the pilot bearing it came with threadlocker and the instructions said to apply it and stick it in the flywheel. I had a really bad feeling about that because a good fitting pilot bearing you have to beat in.

Set up 3: Since this trans seemed fine and I bought it for $100 bucks because someone couldn't figure out how to get the back section on I had a known good trans and foolishly sold the 04' trans. A while later third gear blew on me from the previous owner not being nice to the trans. This is when I changed all the bearings and gears to a spare blown trans. I ran that same spec clutch and flywheel with the newly swapped over box. Noise still there.

Set up 4: Swapped over the 2.0L for the sti 2.5. This time I was just tired of that decel noise. While not insanely loud like yours people still looked at me like my car was about to break. I finally said screw it and had a wrx stock flywheel laying around. I sent it out to get resurfaced and put that in with the engine. The noise was basically gone. I also should add this was the first time I ran a stock pilot bearing. It seemed within a few weeks the noise was just a little more noticable but still not as bad as it was and I didn't get "the look" any more.

Set up 5: The spec clutch which I loved and thought it felt awesome crapped out. It was rated for 500 plus ft lbs of tq and couldn't handle 350 ft lbs to the wheels. I knew I was getting retuned for more boost so I went with old reliable. I went back to ACT. I decided to go with the 6 puck and the streetlight flywheel again. I used a stock pilot bearing again. This time no more noise. Has been gone for at least a year now.
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Old 12-02-2012, 04:16 PM   #37
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I've dealt with this issue for many years in my 02 WRX. I used to run the lightweight clutch and flywheel setups and it made the decel noise even worse. However even with OEM parts, the sound was reduced but still noticeable.

Recently had my center differential and transfer case unit replaced and the noise is completely GONE. Running OEM clutch and flywheel.
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Old 12-04-2012, 05:07 PM   #38
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Net: stick with OEM clutch and flywheel.
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Old 12-04-2012, 05:28 PM   #39
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Quote:
Originally Posted by txl146 View Post
Net: stick with OEM clutch and flywheel.
Some people need a little more clamping for then you do. for your set up an Oem clutch is fine. For guys with 2.5's that actually make torque an Oem clutch won't do ****.
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Old 01-10-2013, 08:23 PM   #40
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My 06 WRX has this same issue an it pisses me off. Everything is stock except my invidia g200 cbe.. as far as I know. Bought car at 73k in june, now at 91k.

I took it to the stealership an tried to get it to do it but for ONCE it didn't do it.. but its worse the longer you drive.. an it only does it in 2nd when using the gear to slow the car..So when I am going to have to stop at a light or traffic, I throw it from 3rd to neutral or push the clutch an stop from 3rd.

Has any one yet figured it out? I found this thread through google..
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Old 01-11-2013, 06:42 PM   #41
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As some people have suggested, tire pressure adjustment might help. After I had the clutch changed and flywheel resurfaced on my 05 wagon, this decel noise reared its ugly head. I adjusted the tire pressure from 36psi all around (thank you lazy shop techs at costco) to 40psi fronts, 34psi rears, where I usually run them. This made the decel noise almost disappear completely. I should note that I have stock 16 inch rims and AS tires with no sidewall support. This is what i think caused MY noise. With the tires at even pressure, the fronts get squished more than the rears due to the engine weight, making the true wheel diameters different. the center diff has to deal with the different wheel rotation speeds front vs rear and loads the transmission in a direction that some of the bearings dont like, hence decel noise. With the tire pressure adjusted, all wheels the same diameter, no loading one way or the other in the tranny, the bearings spin freely, no decel noise.

Last edited by cspark0; 01-12-2013 at 10:01 PM.
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Old 01-13-2013, 06:57 AM   #42
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Typical subaru deceleration noise, especially from our bugeyes.

Nothing to write home about, just keep a little bit of throttle open and you're good to go, never will have to hear it
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Old 01-13-2013, 09:33 AM   #43
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Quote:
Originally Posted by Tenament View Post
Typical subaru deceleration noise, especially from our bugeyes.

Nothing to write home about, just keep a little bit of throttle open and you're good to go, never will have to hear it
I dont believe it, not after what happened to me...

I call bad pilot bearing

I personally think people simply didnt want to track down the ACTUAL problem to begin with (verse dropping the trans again which sucks) and have decided LIVING WITH IT is the " proper" way...

I call BS on this noise
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Old 01-15-2013, 05:36 PM   #44
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Anybody with sti's experience this? Mine just started doing it. Only happens when warm, let off the gas with the rpms over 3k and as I slow down it sounds real ugly between 3k and 2k as the rpms drop.
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Old 02-15-2013, 12:18 AM   #45
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This is the problem that has been haunting me since I pretty much got my car last june. Posted in many threads, discussed it but as far as I know no one has taken it in an ever figured it out. I took it in an that one day it DIDNT make the noise. It doesnt do it on rainy days as bad, an is worse after driving for awhile (warm). Someday I hope to figure it out..
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Old 02-15-2013, 05:53 PM   #46
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Well... mine started right after I replaced clutch with OEM Exedy replacement clutch with resurfaced flywheel.
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Old 05-03-2013, 03:51 PM   #47
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Just started getting this noise about a month ago. I have a OEM clutch with an ACT streetlite flywheel, but those were installed over a year ago.

The good news that seems to be coming from this thread is that other than the noise, no damage or other side effects seem to be showing up. So I'll just ignore it
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Old 05-03-2013, 10:31 PM   #48
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Quote:
Originally Posted by txl146 View Post
Problem: grinding noise from transmission area with foot off the gas pedal while cruising on 02 WRX
How long has the car been making the noise: for a couple of years now...

Today, I had new clutch installed by a shop, but noise has gotten noticeably worse. However, with foot back on the gas pedal, noise disappears completely.

Anyone knows what could be causing this noise? Car has had this noise for a while now, but has only gotten noticeably worse after new clutch was installed.
If you have a lightened flywheel then Its the flywheel. My streetlight did the exact same thing between 2000-3000rpms. If yours isnt doing it at higher rpm...Turn on the radio, quick fix. Otherwise have shop your shop inspect it.
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Old 05-04-2013, 07:16 AM   #49
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Quote:
Originally Posted by boostmasterflex View Post
If you have a lightened flywheel then Its the flywheel. My streetlight did the exact same thing between 2000-3000rpms. If yours isnt doing it at higher rpm...Turn on the radio, quick fix. Otherwise have shop your shop inspect it.
You do know his post is from 3 years ago ;-)
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Old 05-05-2013, 11:02 PM   #50
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even though this thread is old, ill bump it up...

I have a 2011 WRX...

Installed a Exedy stage 1 clutch w/ OEM resurfaced flywheel and I have the same noise.
It became more harsh after installing my shifter bushings and my tranny mount.

It was insanely annoying at first but now im used to it so, its just there
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