Welcome to the North American Subaru Impreza Owners Club Thursday October 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-07-2003, 01:59 PM   #1
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default Is anyone running a six speed in a GC, GM body car?

I know there are a few people that are running a six speed on their WRX's, but has anyone put one in their GC/GM RS? Would it fit?

-Wes
* Registered users of the site do not see these ads.
RebelINS is offline   Reply With Quote
Old 01-07-2003, 02:59 PM   #2
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

you have to re-arrange the tunnel and a lot of other things. bascically our trans tunnel isn't designed for it's use.

jeremy
HndaTch627 is offline   Reply With Quote
Old 01-08-2003, 07:22 PM   #3
garface
Scooby Guru
 
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
Vehicle:
MY00 RS/STi7
MY01 RS Both Silverthorne

Default

Supposedly the tranny tunnel needs to be banged out. There's a few guys in Taiwan or Singapore that have them in their wagons. They were the guys who posted the 2.5 turbo wagons with the brembos and everything you can imagine in the gallery. Check with one of them and let us know what they say.
garface is offline   Reply With Quote
Old 01-08-2003, 10:42 PM   #4
dwx
Scooby Guru
 
Member#: 8343
Join Date: Jul 2001
Chapter/Region: MWSOC
Location: Atlanta, GA
Vehicle:
2005 2012 Jeep
2013 DGM BRZ

Default

I'm 90% sure Ver. III on the board has one. Simon Lines from Prodrive I believe has one as well.
dwx is offline   Reply With Quote
Old 01-08-2003, 10:53 PM   #5
garface
Scooby Guru
 
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
Vehicle:
MY00 RS/STi7
MY01 RS Both Silverthorne

Default

Actually, I was going to post this exact same question today. I wish it was one of those myths like the original ideas on the parts needed to do the 6 speed conversion. Hopefully someone can say for sure.
garface is offline   Reply With Quote
Old 01-09-2003, 02:46 AM   #6
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

the tunnel needs to be widened.

Jeremy
HndaTch627 is offline   Reply With Quote
Old 01-09-2003, 04:18 AM   #7
denmark1
Scooby Newbie
 
Member#: 19378
Join Date: May 2002
Location: Randers,Denmark
Vehicle:
1997 STI Type-R 555

Default

Tjek the post on the MRT BBS about the 6speed.

It seem that its only minor things like starterbracket and the rear tailshaft that need to be shorter.()

Im thinking about doing it later on, when i break mine and i know it will.()


Skassa
denmark1 is offline   Reply With Quote
Old 01-11-2003, 12:28 AM   #8
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

So it sounds like the only thing keeping it from working is the shape of the trans tunnel. Is there any cleaner way to widen the trans tunnel without just going at it with a hammer?

I believe that a 4EAT propshaft will fit between the trans and rear diff.

-Wes
RebelINS is offline   Reply With Quote
Old 01-11-2003, 12:31 AM   #9
garface
Scooby Guru
 
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
Vehicle:
MY00 RS/STi7
MY01 RS Both Silverthorne

Default

These are the guys I was talking about: http://forums.nasioc.com/forums/show...highlight=ej25
garface is offline   Reply With Quote
Old 01-11-2003, 12:49 AM   #10
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

I just emailed that guy, hopefully he responds! If so, I will be sure to post what he says.

-Wes
RebelINS is offline   Reply With Quote
Old 01-11-2003, 02:54 AM   #11
jasona
Scooby Specialist
 
Member#: 11786
Join Date: Oct 2001
Chapter/Region: AKIC
Location: Alaska
Vehicle:
2014 OB 2.5i 6MT
Silver

Default

got something against the gf body, best looking of all imprezas (save 22b)?
jasona is offline   Reply With Quote
Old 01-11-2003, 11:25 AM   #12
Ver.III
Scooby Specialist
 
Member#: 1185
Join Date: Mar 2000
Location: North of the border
Vehicle:
I flap my gums
and now I'm a specialist

Default

The tranny tunnel does not have to be modified alot. The only real problem with the GC is where the 6-speed linkage is. There is an extra re-enforeced external rib which interferes with the shifting. This is not on the Wrx. So a little tapping with the BMF hammer is needed. I got away from this since I run a different tranny mount . I run a old Grp A. gearbox mount.
Ver.III is offline   Reply With Quote
Old 01-11-2003, 12:38 PM   #13
Z1 Performance
Former Vendor
 
Member#: 9327
Join Date: Aug 2001
Location: Z1Auto.com
Default

Exactly VIII..the linkage area is really the only part that needs to be changed...we have sold more 6 speeds to GC owners than new age owners so far!


Adam
Z1 Performance is offline   Reply With Quote
Old 01-11-2003, 12:43 PM   #14
garface
Scooby Guru
 
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
Vehicle:
MY00 RS/STi7
MY01 RS Both Silverthorne

Default

How does the group A mount change the location of the tranny enough to still line up but not hit the "rib"? Is it an "extra renforced rib" or an extra "reinforced rib"? Does that make sense?
I love how very reputable shops I call tell me it's another full day of work and at least $500 extra for all the extra banging out they have to do.
garface is offline   Reply With Quote
Old 01-11-2003, 01:29 PM   #15
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally posted by Z1 Performance
Exactly VIII..the linkage area is really the only part that needs to be changed...we have sold more 6 speeds to GC owners than new age owners so far!


Adam
there where are all the GM/GC 6 speed cars at??????
HndaTch627 is offline   Reply With Quote
Old 01-11-2003, 03:05 PM   #16
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

Quote:
got something against the gf body, best looking of all imprezas (save 22b)?
Nope, I like wagons, but it isn't what I have, plus was just trying to get across that I was interested in that body style, instead of the new body style (which isn't new body style anymore, but you know what I am talking about). Obviously any input from wagon owners is welcome.

Ver. III - So are you actually running a 6 speed trans?

Quote:
there where are all the GM/GC 6 speed cars at??????
Good point, there doesn't seem to be hardly any posts about GM/GC/GF cars doing this, it mostly seems to be GDA owners.

-Wes
RebelINS is offline   Reply With Quote
Old 01-12-2003, 01:43 AM   #17
Ver.III
Scooby Specialist
 
Member#: 1185
Join Date: Mar 2000
Location: North of the border
Vehicle:
I flap my gums
and now I'm a specialist

Default

I have a Jap 6-speed with the Suretrac front diff mated with a 97 Sti V3 engine. Its a 3.90 final with a 1:1 center diff reduction and with the shorter 5th/6th gear. I still run the stock R160 rear diff but with a 3.90 and Sti LSD .

The old Grp A mount I use eliminates the rear section of the stock mount and uses a harder rubber bushing. I did notice on the GD cars that the Sti tranny mount is shorter than the GC8 mount.
Ver.III is offline   Reply With Quote
Old 01-13-2003, 12:54 AM   #18
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally posted by Ver.III
I have a Jap 6-speed with the Suretrac front diff mated with a 97 Sti V3 engine. Its a 3.90 final with a 1:1 center diff reduction and with the shorter 5th/6th gear. I still run the stock R160 rear diff but with a 3.90 and Sti LSD .

The old Grp A mount I use eliminates the rear section of the stock mount and uses a harder rubber bushing. I did notice on the GD cars that the Sti tranny mount is shorter than the GC8 mount.
that's the kind of info i am looking for seeing as how i am in the market for a trans. How much banging is needed to make this thing fit?? Anyone have any pictures?? I'd also like to know if anyone has broken these and at what power levels.

Jeremy
HndaTch627 is offline   Reply With Quote
Old 01-15-2003, 12:01 AM   #19
Z1 Performance
Former Vendor
 
Member#: 9327
Join Date: Aug 2001
Location: Z1Auto.com
Default

The 6 speed GC's are out there, but not really in this country..we have sold all but one of our six sppeds in teh past ~2 years to people overseas.

Adam
Z1 Performance is offline   Reply With Quote
Old 01-15-2003, 02:46 AM   #20
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

i guess what i am really after is input as far as power handling are the torque numbers, i want a trans that can take some flogging, i know al's held but i was also told that he had a tendancy to baby shift it. I want to know if it's as tough as everyone claims.

Jeremy
HndaTch627 is offline   Reply With Quote
Old 01-16-2003, 11:44 PM   #21
Z1 Performance
Former Vendor
 
Member#: 9327
Join Date: Aug 2001
Location: Z1Auto.com
Default

it is the BEST bang for the buck tranny out there IMHOP, though the older STi RA ones are very good as well (my old one has still held up after over 2 years and many hard miles, and needed only a second gear synchor (box is an STi V3 RA)

Adam
Z1 Performance is offline   Reply With Quote
Old 01-18-2003, 07:11 PM   #22
DoorKnob
Scooby Newbie
 
Member#: 395
Join Date: Oct 1999
Location: Daly City, CA USA
Vehicle:
2000 Impreza 2.5RS
Blue Ridge Pearl

Default

1. 6MT tranny
2. 6MT clutch set, flywheel
3. 6MT tranny shaft
4. 6MT rear crossbeam set
5. 6MT shaft nub and new shift cloth
6. Change gear ratio: front 3.9, middle 1:1, rear 3.9.
7. A nice place can lift your car, at leaset two person and proper tools

From the other post this is what I gather you need for the install. But what are 4) rear crossbeam set and 5) shaft nub?
DoorKnob is offline   Reply With Quote
Old 01-19-2003, 02:11 PM   #23
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

I am geussing that you are referring to trans xmembers. Is it true that you can use a 4EAT driveshaft, or has this only ben theorized?

-Wes
RebelINS is offline   Reply With Quote
Old 01-19-2003, 03:18 PM   #24
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

you can use the USDM wrx clutch and flywheel, you don't necessarily have to buy the 6MT ones. it has been theorized that you can use the automatic driveshaft. changing out the rear gear isn't hard, hell i'd be curious to see what rear diff they USDM STi will have. If it comes witht he R180 it's going to make parts VERY easy to come by

jeremy
HndaTch627 is offline   Reply With Quote
Old 01-20-2003, 02:19 AM   #25
Ver.III
Scooby Specialist
 
Member#: 1185
Join Date: Mar 2000
Location: North of the border
Vehicle:
I flap my gums
and now I'm a specialist

Default

Quote:
Originally posted by DoorKnob
1. 6MT tranny
2. 6MT clutch set, flywheel
3. 6MT tranny shaft
4. 6MT rear crossbeam set
5. 6MT shaft nub and new shift cloth
6. Change gear ratio: front 3.9, middle 1:1, rear 3.9.
7. A nice place can lift your car, at leaset two person and proper tools

From the other post this is what I gather you need for the install. But what are 4) rear crossbeam set and 5) shaft nub?
1.) GD 6-speed
2.) clutch , flywheel , clutch slave
- you would need this if swapping into a GC. You don't really need this if swapping on a GD. I estimate that the stock clutch set up is good for about 300hp

3.) prop shaft - I shortened my stock RS prop for $150 Cdn. So what ever is cheaper between this and a used/new automatic prop.

4.) You don't need the transmission mount. Its the same as the RS. Only difference is the the rear rubber mount. The GD is shorter in height.

5.) You need the whole 6-speed shifter linkage assembly. You can get away using back the stock shifter boot.


6 .) You would only have to change the rear diff ratio since the GD gearbox comes with a 3.90 front. Only thing to take note is certain gearboxes from certain countries have the 1.1:1 center diff reduction simular to the USDM Wrx.

7.) A nice warm shop with a hoist would be nice !
Ver.III 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
5 speed went boom - anyone have a six speed? STiGuy23 Private 'Wanted' Classifieds 1 02-21-2010 08:28 PM
What are the turbo engine swappers doing about the radiator and hoses on GC/GM body? garface Subaru Conversions 57 04-13-2005 05:55 PM
Anyone interested in some GC/GM red and clear tails? scoobyimprza Mid Atlantic Impreza Club -- MAIC 30 08-17-2004 10:34 PM
Is anyone running the STI ecu in the Forester XT with the stock turbo ? Slatts Engine Management & Tuning 2 07-05-2004 04:06 PM
Is anyone running the WRX six disc in a GC? King Ding187 Car Audio, Video & Security 1 01-30-2004 06:43 PM


All times are GMT -4. The time now is 05:07 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.