Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 02-26-2009, 01:25 AM   #101
Unabomber
Big Ron
Super Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

I get blamed constantly for being a dong on these forums, so I'm not trying to be one, but READ my son.....directly from the first post:

Are there any other important things to remember when replacing the clutch myself? Yes, unless using a new flywheel, the old flywheel must be resurfaced on a blanchard grinder or by a professional shop who uses that or other specific type of machinery for resurfacing. DO NOT use emery cloth, a Dremel tool, a regular lathe, or other shortcut. While flywheels work similar in fashion to brake rotors, you cannot get away with the unusual techniques some people use with brake rotors during a brake pad change.

My post is fact and anyone that says you can't do it is ignorant as to how to do it.
* Registered users of the site do not see these ads.
Unabomber is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-26-2009, 10:21 AM   #102
sdh7711
Scooby Newbie
 
Member#: 150593
Join Date: Jun 2007
Chapter/Region: NESIC
Location: Boston Metro, MA
Vehicle:
2004 Impreza WRX
JDM V7 Sti

Default

Quote:
Originally Posted by Unabomber View Post
I get blamed constantly for being a dong on these forums, so I'm not trying to be one, but READ my son.....directly from the first post:

Are there any other important things to remember when replacing the clutch myself? Yes, unless using a new flywheel, the old flywheel must be resurfaced on a blanchard grinder or by a professional shop who uses that or other specific type of machinery for resurfacing. DO NOT use emery cloth, a Dremel tool, a regular lathe, or other shortcut. While flywheels work similar in fashion to brake rotors, you cannot get away with the unusual techniques some people use with brake rotors during a brake pad change.

My post is fact and anyone that says you can't do it is ignorant as to how to do it.
Sorry was looking under the Flywheel FAQ for it and wouldn't have looked under clutch do it yourself as I wold not attempt that myself as I don't have the tools or experience to do so.
sdh7711 is offline   Reply With Quote
Old 03-10-2009, 12:21 AM   #103
bsikora
Scooby Specialist
 
Member#: 125573
Join Date: Sep 2006
Chapter/Region: TXIC
Location: Houston
Vehicle:
2006 2.5i
ProTune by Sean S.

Default

just a quick question: if i were to get a new clutch which one should i get? OEM or one step up? brand? what does everyone think?

Blake
bsikora is offline   Reply With Quote
Old 03-10-2009, 04:10 AM   #104
Unabomber
Big Ron
Super Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

I think you should lay down your internet and walk away.
Unabomber is offline   Reply With Quote
Old 03-10-2009, 06:02 PM   #105
bsikora
Scooby Specialist
 
Member#: 125573
Join Date: Sep 2006
Chapter/Region: TXIC
Location: Houston
Vehicle:
2006 2.5i
ProTune by Sean S.

Default

Quote:
Originally Posted by Unabomber View Post
I think you should lay down your internet and walk away.
i read ur stuff on clutches but was wondering what brands are good? and me being NA i should most likely stay with OEM correct? i was asking b/c i dont know much about clutches. So why say that?


Blake
bsikora is offline   Reply With Quote
Old 03-14-2009, 08:27 PM   #106
fallinfromgrace
Scooby Newbie
 
Member#: 172811
Join Date: Feb 2008
Chapter/Region: Tri-State
Location: dover,pa
Vehicle:
2002 wrx
blaze yellow

Default

i own a 2002 subaru wrx 5 sp. manual.i recently blew my 1rst gear.i took it to a replicable place for rebuild and it was suggested i get lagacy gt gear set. ok i went with it.got the trans back installed it in my car,ran absolutely great for one day then all of a sudden the next day my check engine light came on,it back fired and my speedometer quit working.
i called the place they said that subaru changed their speedo gear. it makes the speedometer work and controls everything hence why it backfired and ran like crap. i was told to bring them my car they'll tear the trans out ,tear it apart and put the new speedo gear in it. sounds like a cool deal. saved me on labor .
well i got the car back and now im hearing a slight grinding noise coming from the transmission when i let off the throttle or downshifting,coming to a red light ,etc. and it gets quieter when i push the clutch in.
i called them,they said its my clutch because of the lightweight flywheel,now ive had this in my car before on the old transmission and never heard any vibrations or grinding of anything.
im almost certain its not the throw out bearing,its a different type of noise AND besides the clutch and stuff is brand new,plus i had ACT resurface the flywheel prior to replacing the clutch and transmission.
its almost sounding like something inside isnt meshing very well,has anyone else had this sort of trouble with replaced gear sets of any sort?
fallinfromgrace is offline   Reply With Quote
Old 03-15-2009, 08:39 AM   #107
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

no.

but just about everyone with a LW fly has heard increased deceleration noise.
ride5000 is offline   Reply With Quote
Old 03-16-2009, 12:24 AM   #108
Vlad
Scooby Guru
 
Member#: 46135
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
19 GLA45 AMG
C63 AMG

Default

About the flywheel FAQ and the link to calculate the equivalent weight savings, from the flywheel weight reduction:
In the Excel spreadsheet there is a formula error
At line I92, change the formula to read
=INT(I91)

The equivalent final drive didn't make sense, for aftermarket wheel sizes..
With the change, the equivalent weight savings are even bigger.
Vlad is offline   Reply With Quote
Old 03-19-2009, 02:08 AM   #109
kennyd1gital
Scooby Newbie
 
Member#: 204337
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
2008 Impreza WRX
Black

Default

Quote:
Originally Posted by ride5000 View Post
but just about everyone with a LW fly has heard increased deceleration noise.
I just had an Exedy stage 2 clutch and a LW flywheel installed in my car. When I let off the throttle, I hear the same sort of grinding noise. Is this normal, or is it possible that something is wrong? I'm concerned because I had to replace the stock clutch on my 08 WRX because something caused it to burn up with less than 6,000 miles on the car. I'm worried that there might be something wrong with the car that is causing the clutch to slip against the pressure plate while driving.
kennyd1gital is offline   Reply With Quote
Old 05-22-2009, 09:01 AM   #110
redrexmeister
Scooby Specialist
 
Member#: 111692
Join Date: Apr 2006
Chapter/Region: Tri-State
Location: Jersey burbs
Default

I had a stock flywheel (2004) resurfaced at NAPA machinist shop on some sort of rotary grinder. The guy took about 0.005" of the surface material. He also mentioned that he had to disassemble the flywheel to put it on the grinder.

Is the dissassembly of a stock flywheel fairly typical process? are there any potential balancing concerns?
redrexmeister is offline   Reply With Quote
Old 08-28-2009, 06:13 PM   #111
Assami
Scooby Newbie
 
Member#: 130699
Join Date: Oct 2006
Location: a U.S in Saudi Arabia
Vehicle:
2005 STI JDM 2.0L
Blue 315whp

Default

HI

I have a 2005 JDM 2.0L. I need a clutch. From your experience what do you think is better for performance and light weight ?


• Exedy Hyper Metal Compe-D twin plate clutch. http://www.nengun.com/exedy/hyper-me...n-plate-clutch

• Carbonatics 2Carbon Plate clutch http://www.carbonetic.net/products/twinandtriple.html


My car will put out 400whp on 93oct with 24psi.

Do you recommend anything ells for a light weight ?

Thanks
Assami is offline   Reply With Quote
Old 09-27-2009, 03:20 PM   #112
Arctic Cougar
Scooby Newbie
 
Member#: 223815
Join Date: Sep 2009
Chapter/Region: AKIC
Location: Fairbanks, AK
Vehicle:
2005 WRX STi
Black

Default

great info! I appreciate the hard work!
Arctic Cougar is offline   Reply With Quote
Old 09-28-2009, 12:50 PM   #113
dwmoss_68
Scooby Specialist
 
Member#: 6030
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Northeastern PA , USA
Vehicle:
04 Gold FXT
07 WRB FXT Sport

Default

Quote:
Originally Posted by Unabomber View Post
Can I use a 5MT clutch in my 5MT?
I'm guessing this should say, Can I use a 5MT clutch in my 6MT.


reading my clutch faq before looking at replacing my clutch (189k mile 02wrx)


dm
dwmoss_68 is offline   Reply With Quote
Old 10-27-2009, 04:31 PM   #114
turbo01gc8
Scooby Newbie
 
Member#: 217973
Join Date: Jul 2009
Location: northern tier, PA
Vehicle:
2001 turbo impreza L
acadia green

Default

Quote:
Originally Posted by Anihil8r View Post
I just had an ACT 4 puck installed. Any suggestions on how a clutch that grabs so hard and quick will affect the drive train. Such as the transmission, drive shafts, etc. Would an upgraded tranny and/or motor mounts be recommended to keep things from possibly breaking?
i also installed a 4 puck disc and i got some bad chatter on take off and when downshifting unless i'm at a high rpm any suggestions?
turbo01gc8 is offline   Reply With Quote
Old 11-03-2009, 01:49 PM   #115
68Cadillac
Scooby Specialist
 
Member#: 95901
Join Date: Sep 2005
Default

Quote:
Originally Posted by turbo01gc8 View Post
i also installed a 4 puck disc and i got some bad chatter on take off and when downshifting unless i'm at a high rpm any suggestions?
Welcome to the world of puck clutches. Try to think of it as a good thing like a turbo blow off hiss, or straight cut gear whine. It's a feature.
68Cadillac is offline   Reply With Quote
Old 01-19-2010, 10:24 PM   #116
wjfawb0
Scooby Newbie
 
Member#: 122526
Join Date: Aug 2006
Chapter/Region: South East
Location: TN
Vehicle:
2020 Subaru STI
silver

Default

For reference, below are links to pictures of my clutch install on a 2005 STi.

http://www.fawbush.org/images/2009_12_05ST...a_headers_1.JPG
http://www.fawbush.org/images/2009_12_05ST...a_headers_2.JPG
http://www.fawbush.org/images/2009_12_05ST...ission_jack.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_1.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_2.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_3.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_4.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_5.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_6.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_7.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_8.JPG
http://www.fawbush.org/images/2009_12_05ST...e_removal_1.JPG
http://www.fawbush.org/images/2009_12_05ST...e_removal_2.JPG
http://www.fawbush.org/images/2009_12_05ST...ge_clutch_9.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_10.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_11.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_12.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_13.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_14.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_15.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_16.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_17.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_18.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_19.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_20.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_21.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_22.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_23.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_24.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_25.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_26.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_27.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_28.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_29.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_30.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_31.JPG
http://www.fawbush.org/images/2009_12_05ST...e_clutch_32.JPG
wjfawb0 is offline   Reply With Quote
Old 02-03-2010, 12:51 AM   #117
txl146
Scooby Guru
 
Member#: 32459
Join Date: Feb 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
02 WRX VF34 (SOLD)
Junior Tuned 301whp

Default

Looks like a lot of people are having grinding/chatter problem with lighter flywheel (or resurfaced flywheel), which is very annoying. Figured I would post the link if it hasn't been done.

http://forums.nasioc.com/forums/show....php?t=1097682
txl146 is offline   Reply With Quote
Old 02-03-2010, 12:04 PM   #118
ACTman
Scooby Newbie
 
Member#: 113222
Join Date: Apr 2006
Default

Quote:
Originally Posted by txl146 View Post
Looks like a lot of people are having grinding/chatter problem with lighter flywheel (or resurfaced flywheel), which is very annoying. Figured I would post the link if it hasn't been done.

http://forums.nasioc.com/forums/show....php?t=1097682
The deceleration noise described has nothing to do with the surface or resurface since the clutch is fully engaged at the time. Chatter is a totally different subject, having to do with harsh engagement or shuddering only during engagement. The two subjects are often confused in discussions like this on the message boards.

First let's talk about chatter. This is something felt, and not so much heard. Clutch chatter is usually from the interaction of the friction surfaces (as long as everything else is ok). For instance the replacement discs from Exedy which are made in their Thailand friction material plant seem to engage more harshly than the OE friction materials (assumed made in Japan).

Deceleration noise (or other gear noises) occurs because of engine pulses being transmitted to the transmission gears. Of course the engine pulses (torsional vibrations) are influenced by a number of things such as compression, boost, timing, cams, etc. What normally helps to dampen these torsional vibrations out are the springs in the clutch disc and the heavy weight of the flywheel. In the case of the 06 thread you reference, keep in mind that the Exedy aftermarket replacement clutch is different from the stock clutch. The stock Subie (Exedy manfactured) clutch conforms to stricter standards and specifications. The OE clutch has a "wide angle damper" design which may or may not be the case with the replacement part. I don't know the exact details in this case without looking at the parts, but we have seen this all the time. Just because it says Exedy doesn't mean it is the same as OE. In some cases the automaker prevents the clutch manufacturer from offering the same part on the aftermarket, since they have a lot invested in testing, tuning the dampening, etc so they can only offer a similar part. Sometimes the clutch manfacturer changes the design on their aftermarket replacement parts to save costs.

A lightened flywheel can contribute to gear noise (there are several different types besides decel, btw), but you also have to consider what disc is being installed and that goes both ways. Also consider what changes have been made to the engine and tuning.
ACTman is offline   Reply With Quote
Old 02-24-2010, 12:09 AM   #119
MAGBOOST
Scooby Newbie
 
Member#: 195888
Join Date: Nov 2008
Chapter/Region: SCIC
Location: OC, CA
Vehicle:
2004 WRX

Default

thank god i found this thread lol
MAGBOOST is offline   Reply With Quote
Old 03-26-2010, 02:23 AM   #120
JSWseattle
Scooby Newbie
 
Member#: 240035
Join Date: Mar 2010
Location: Az
Vehicle:
2002 wrx wagon
black

Default Spline Question.

I am sorry if this has been covered but I have not been able to find the answer.


I'm in the market for a new clutch and flywheel, it seams there is a little confusion between the sites I've been through. I have a 2002 wrx 5mt. what is the input shaft spline count? I have seen 23 & 24. I just want to verify prior.
JSWseattle is offline   Reply With Quote
Old 03-26-2010, 09:31 PM   #121
Jagular1785
Scooby Newbie
 
Member#: 194452
Join Date: Nov 2008
Chapter/Region: MWSOC
Location: Iowa City, IA
Vehicle:
The Mr.
Wizard

Default

I know a few have touched on this subject, but my situation is a bit different. I recently replaced my oem clutch with a Spec stage 1 and resurfaced my OEM flywheel. From the beginning, the clutch has been severely chattering. I took the thing out a week ago and tried to get spec to help me. But they wanted me to send the whole assembly to them in alabama, I live in kansas city. I also go to school in Iowa, so this just wasn't going to work for me to be without transportation to and from school. All they really told me was the hotspots were normal and it shouldn't be chattering. Now they refuse to even answer my emails.

So I cleaned all the surfaces (the pressure plate and flywheel had some hot spots but they were superficial). It was a bit better for about 20 miles. I did not see any obvious contamination from oil or grease, but I can't fully rule that out. I am thinking the fly is warped, but I have no way of finding out until I take it out again. Advice?
Jagular1785 is offline   Reply With Quote
Old 04-09-2010, 09:51 PM   #122
subabubuWRX
Scooby Newbie
 
Member#: 210336
Join Date: May 2009
Default

Hey i have a question... What is the difference between the flywheels for the Pre 06/01 Build WRX and the After 06/01 Build WRX? My WRX is a 05/01 Build and I was going to buy a used fidanza flywheel but it was off of an WRX that was built in 2002. Is it physically different and what on either the engine or transmission makes them not interchangable?
subabubuWRX is offline   Reply With Quote
Old 05-01-2010, 11:44 PM   #123
SubyRS03
Scooby Newbie
 
Member#: 245297
Join Date: Apr 2010
Chapter/Region: South East
Location: Greer,SC
Vehicle:
2004 WRX vf48 93 oct
WRB

Default

Dude you are the Freaking MAN!!!!
SubyRS03 is offline   Reply With Quote
Old 05-29-2010, 02:23 PM   #124
OldFartRacingTeam
Scooby Specialist
 
Member#: 192016
Join Date: Oct 2008
Location: J-Dirty Jacksonville
Vehicle:
$7 1 or 2 legged
scallywag pirate hookers

Default

whats the difference between a 97 lego fly wheel and an 02 WRX fly wheel, besides part numbers????
OldFartRacingTeam is offline   Reply With Quote
Old 08-31-2010, 12:08 PM   #125
bcjp11
*** Banned ***
 
Member#: 249983
Join Date: Jun 2010
Chapter/Region: Tri-State
Location: Manhattan
Vehicle:
99

Default

Obviously not a clutch expert so seeking feedback and opinions from more experienced minds.

I read the warning about buying too much clutch. However, is it mechanically acceptable to buy too much clutch with the idea that your car will "grow" into the clutch?

I have my motor and tranny out and I am replacing the clutch. I am going to go with a higher HP setup next Spring. I don't want to redo the clutch work only six months down the road.

Thanks.
bcjp11 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Piston FAQ: Read if you are thinking about buying them! Unabomber Built Motor Discussion 93 03-27-2023 10:35 PM
Spring/Strut/Coilover FAQ: Read if you are thinking of buying them! Unabomber Brakes, Steering & Suspension 45 12-03-2020 12:23 PM
Uppipe FAQ: Read if you are thinking of buying one! Unabomber Newbies & FAQs 396 07-09-2020 02:25 AM
Intercooler Hose FAQ: Read if you are thinking of buying them! Unabomber Newbies & FAQs 43 08-06-2019 03:58 PM

All times are GMT -4. The time now is 06:28 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.