Welcome to the North American Subaru Impreza Owners Club Thursday August 21, 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 12-18-2006, 09:21 PM   #51
DrD
Scooby Guru
 
Member#: 22412
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2012 Legacy 2.5GT
Ice Silver Metallic

Default

Quote:
Originally Posted by MrSlowbaru View Post
Is there any notable differance (additional parts required/fitment issues) between doing a 6mt swap from an 04 sti vs. a swap from 05+ for an 05 wrx
lots of stuff required for the 6spd swap - iirc axles, hubs, driveshaft, and rear differential - if you search, there have been a number of swap threads with better info.
* Registered users of the site do not see these ads.
DrD is offline   Reply With Quote
Old 02-08-2007, 01:16 AM   #52
BiGGeE1787
Scooby Newbie
 
Member#: 110370
Join Date: Mar 2006
Chapter/Region: Tri-State
Vehicle:
06 WRX TR
BLUE

Default

Thats alot to swallow...but very good write up!!!
BiGGeE1787 is offline   Reply With Quote
Old 04-13-2007, 08:38 PM   #53
hunter1969
Scooby Newbie
 
Member#: 146188
Join Date: Apr 2007
Default 07 Outback auto transmission question

I am considering buying an 07 automatic outback xt but during my research I have found comments that the automatic transmission saps performance. are there any remedies or upgrades for this?

thank you
hunter1969 is offline   Reply With Quote
Old 04-14-2007, 07:17 AM   #54
hunter1969
Scooby Newbie
 
Member#: 146188
Join Date: Apr 2007
Default 07 outback xt automatic transmssion question

I was about to buy my first Subaru and was making a deal on an 07 outback xt wagon. In my research I found a consistent comment that the automatic transmission sapped performance. is there any fix for this? thanks!
hunter1969 is offline   Reply With Quote
Old 05-15-2007, 04:21 AM   #55
StiLimited
Scooby Newbie
 
Member#: 121212
Join Date: Jul 2006
Chapter/Region: SWIC
Vehicle:
2007 Sti Limited
Urban Gray Metallic

Default

Quote:
Originally Posted by Unabomber
[url]
At a recent Subaru meet, we had the Regional Technical Trainer for SOA fly up from Atlanta to speak to us in VA Beach. She said according to SOA stats, 97% of transmission related failures in Subarus are from drivers aged 16-21. Hmmmmm, sort of back up the theory that it's because of inexperienced/dumb stick drivers eh?
Now there's an unbiased source!

Let's see, I don't recall Subaru asking me my age (not even when I bought the car.) And I never provided my age on any service ticket. Wasn't even asked. So I question how they can compile this claimed "data" since they don't have it. I've never seen it on the service ticket, has anyone else? Perhaps it's more anecdotal data....

Another thing, that "statistic" doesn't really mean anything because of the source of the statistic and we don't really know the distribution of ownership by age. I know Subaru has never asked me my age when I take the car for service. So how are they keeping track of me?
StiLimited is offline   Reply With Quote
Old 05-15-2007, 11:34 AM   #56
jhargis
Scooby Specialist
 
Member#: 110304
Join Date: Mar 2006
Location: Crestline, CA
Vehicle:
2004 Volvo S60R
No more Subie

Default

I'm sure that immature kids with a free turbo car from mommy and daddy are a big part of failure cases. You give a car with a driveline that's somewhat fragile due to traction (relative to the average 2WD car) to young drivers, and you will see hightened failure rates.

But StiLimited is absolutely correct. I was never asked for my age when I bought transmission parts. Many of the 16-21 year old drivers would have the car in a parent's name, so that would throw things off as well. How do they gather demographic data for non-subaru affiliated shops that did work outside of warranty repair? Was it a representative sample? How big was that sample? What was done to ensure a fair and even spread of sampling? How many of the cars where brought in by older parents but driven daily by the kids? What's the average age of a wrx driver? What if 97% of them are 16-21? Then obviously, most failure cases would fall in that range. Just throwing some arbitrary percentage out there is meaningless without any information on the variables involved.

Statistical analysis is something I can say that I have a professional opinion on, and marketing folks can bend statistics like no other factor in data gathering. I'd be skeptical in regards to this claim.

BTW, I'm not saying the statistic is impossible or flat out wrong, I'm just questioning how they came up with it.

Last edited by jhargis; 05-15-2007 at 08:58 PM.
jhargis is offline   Reply With Quote
Old 07-17-2007, 09:03 PM   #57
MeetMrGlock
Scooby Specialist
 
Member#: 50885
Join Date: Dec 2003
Chapter/Region: Tri-State
Location: Neanderthal Racing
Vehicle:
04 CUTN EDG STi
neanderthal blackout

Default

Quote:
Originally Posted by foxdeman View Post

thanks for posting that. andrewtech is installing a dog box (1-4; 5th and 6th stay oem) and i'm getting it back in a few weeks. i'm pretty stoked.

thanks unibomber for taking the time to do another great tech piece.
MeetMrGlock is offline   Reply With Quote
Old 08-21-2007, 02:19 PM   #58
BlackWRC
Scooby Newbie
 
Member#: 157203
Join Date: Aug 2007
Location: Austria/Europe
Vehicle:
2005 USDM STi

Default

Hi !

So how much WHP you would say the USDM ´05 STi (DCCD) 6Spd. Tranny could handle ?
Because i cant belive that this tranny can handle +- 350 - 400whp up to ~100k miles ( ruff handling , clutch in @ 4000rpm etc.)
and i didnt found something that helped me further in my question

sorry for my bad english , i´m from Austria and imported me an ´05 USDM because of the EJ25 and the 300hp , now i want my scoob doing a litte bit more performance and i want to figure out what the tranny could handle, here in Austria we can only buy the EUspec which just got the EJ20 with 265HP and a really hurting dealer price of 40 000€ , so nobody of the Tuner here can say me what the EJ25 and the 6spd USDM STi tranny can handle ....

I hope its not to OffTopic for my first post here

Thank you Guy´s
BlackWRC is offline   Reply With Quote
Old 09-06-2007, 04:12 PM   #59
Bala
Scooby Specialist
 
Member#: 112510
Join Date: Apr 2006
Chapter/Region: South East
Location: Delray Beach, Florida
Vehicle:
2006 WRX, Black

Default

I am trying to find out what exactly is involved in doing a tranny swap from a 07 Legacy Spec B into 06 WRX.

Here are some questions i have:

Will I need Legacy's rear Diff? If so, what Diff does the Legacy comes with?
Will I have to use a different drive shaft? If so, which one?
If i do have to change the rear DIff in order to accomodate the Legacy's tranny, will i have to change the rear axles/hubs and brakes?

6 spd manual, spec.B only
1st 3.636
2nd 2.235
3rd 1.521
4th 1.137
5th 0.891
6th 0.707
final 3.454

Ok, I will start a parts list for this swap and you guys please correct me if i m wrong and also tell me what i need to add or take off the list.

2007 Legacy Spec B 6MT tranny swap into 2006 WRX:

1)2007 Legacy Spec B 6MT trasmission
2)SPT 6-speed short throw linkage
3)6-speed shift knob, STI lower dash peace with STI boot
4)2006 automatic trasmission drive shaft (please correct me if i am wrong)
5)6-speed clutch fork (please correct me if i am wrong)
6)STi slave cylinder (please correct me if i am wrong)
7)Reuse stock 2006 WRX rear Diff
8)Reuse Stock 2006 5-speed WRX clutch

Please confirm the above parts are correct or if i need to add additional parts

THanks

The reason I prefere to do the Legacy's Spec B tranny swap over the STI's is because it does not have the DCCD and the tranny itself is cheaper.

Please help, any comment welcomed.

Thanks.
Bala is offline   Reply With Quote
Old 09-23-2007, 01:07 AM   #60
AndyDick
Scooby Newbie
 
Member#: 158766
Join Date: Sep 2007
Chapter/Region: South East
Location: Otown Florida
Vehicle:
2002 WRX
2001 GSXR 750

Default

Does anyone have the part number for the ppg syncromesh 1-4 gear set?
AndyDick is offline   Reply With Quote
Old 09-23-2007, 12:02 PM   #61
Unabomber
Big Ron
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

Part number aınt gonna help you as there ıs only one source for them and thats www.gearboxtech.com so dont thınk you can call up PPG and order them as they wıll tell you to dıe ın a fıre
Unabomber is offline   Reply With Quote
Old 09-23-2007, 12:19 PM   #62
AndyDick
Scooby Newbie
 
Member#: 158766
Join Date: Sep 2007
Chapter/Region: South East
Location: Otown Florida
Vehicle:
2002 WRX
2001 GSXR 750

Default

Quote:
Originally Posted by Unabomber View Post
Part number aınt gonna help you as there ıs only one source for them and thats www.gearboxtech.com so dont thınk you can call up PPG and order them as they wıll tell you to dıe ın a fıre
lol k thats not what i was thinking but thanks for no help
AndyDick is offline   Reply With Quote
Old 09-23-2007, 03:50 PM   #63
Unabomber
Big Ron
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

If you thınk www.gearboxtech.com ıs no help then you obvıously are beyond help. Call them and next tıme start your own thread before clutterıng up an exıstıng one.
Unabomber is offline   Reply With Quote
Old 09-23-2007, 05:37 PM   #64
DrD
Scooby Guru
 
Member#: 22412
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2012 Legacy 2.5GT
Ice Silver Metallic

Default

Quote:
Originally Posted by Unabomber View Post
there ıs only one source for them and thats www.gearboxtech.com
I think there are other vendors, too - www.cascadeautosport.com offers them - there are also a couple of other vendors listed on the PPG site, too... andrewtech could build them all, though - I dunno (I can't afford fancypants mods like that, so I haven't really looked into it )
DrD is offline   Reply With Quote
Old 09-23-2007, 06:35 PM   #65
AndyDick
Scooby Newbie
 
Member#: 158766
Join Date: Sep 2007
Chapter/Region: South East
Location: Otown Florida
Vehicle:
2002 WRX
2001 GSXR 750

Default

Quote:
Originally Posted by Unabomber View Post
If you thınk www.gearboxtech.com ıs no help then you obvıously are beyond help. Call them and next tıme start your own thread before clutterıng up an exıstıng one.
I used the search button like one of your "manifestos" said to do. am i doing it wrong? sorrrrry
AndyDick is offline   Reply With Quote
Old 09-23-2007, 08:32 PM   #66
KevinG
Scooby Specialist
 
Member#: 146091
Join Date: Apr 2007
Chapter/Region: NWIC
Location: Atlanta GA
Vehicle:
14 Mazda 3
Red

Default

Quote:
Originally Posted by Bala View Post
I am trying to find out what exactly is involved in doing a tranny swap from a 07 Legacy Spec B into 06 WRX.

Here are some questions i have:

Will I need Legacy's rear Diff? If so, what Diff does the Legacy comes with?
Will I have to use a different drive shaft? If so, which one?
If i do have to change the rear DIff in order to accomodate the Legacy's tranny, will i have to change the rear axles/hubs and brakes?

6 spd manual, spec.B only
1st 3.636
2nd 2.235
3rd 1.521
4th 1.137
5th 0.891
6th 0.707
final 3.454

Ok, I will start a parts list for this swap and you guys please correct me if i m wrong and also tell me what i need to add or take off the list.

2007 Legacy Spec B 6MT tranny swap into 2006 WRX:

1)2007 Legacy Spec B 6MT trasmission
2)SPT 6-speed short throw linkage
3)6-speed shift knob, STI lower dash peace with STI boot
4)2006 automatic trasmission drive shaft (please correct me if i am wrong)
5)6-speed clutch fork (please correct me if i am wrong)
6)STi slave cylinder (please correct me if i am wrong)
7)Reuse stock 2006 WRX rear Diff
8)Reuse Stock 2006 5-speed WRX clutch

Please confirm the above parts are correct or if i need to add additional parts

THanks

The reason I prefere to do the Legacy's Spec B tranny swap over the STI's is because it does not have the DCCD and the tranny itself is cheaper.

Please help, any comment welcomed.

Thanks.
bump this question.
KevinG is offline   Reply With Quote
Old 09-23-2007, 08:37 PM   #67
LastResort
Scooby Guru
 
Member#: 99289
Join Date: Oct 2005
Default

I *think* the final drive in the Spec.B is 3.9, while the 06 WRX is 3.7. You'll need the right diff, or at least the right ring and pinion.
LastResort is offline   Reply With Quote
Old 09-24-2007, 09:59 AM   #68
seesPiKegrind
Scooby Specialist
 
Member#: 78945
Join Date: Jan 2005
Chapter/Region: Tri-State
Location: Brooklyn, NY
Vehicle:
2003 Baja Turbo
Black on Grey

Default

subscribed. so helpful. thanks!
seesPiKegrind is offline   Reply With Quote
Old 10-16-2007, 11:48 PM   #69
Dave_RalliSpec
Scooby Newbie
 
Member#: 45702
Join Date: Oct 2003
Default

Excellent review of the basics of gearboxes! Some very interesting and well written stuff....just got around to reading this (shows you how often I get a chance to go on here).

A few things that are not mentioned that might be worth noting:

1. There is less power loss through a straight cut gear set and that is the primary reason for their use in motorsport. All other factors being equal a helical gear is stronger than a straight cut gear....however, very rarely are all other factors equal.

2. You did not mention any superfinishing treatments. Currently REM isotropic superfinishing is being used in gearboxes at the highest levels of motorsport. The benefits are numerous. Reduction in friction and lower operating temps, increased surface contact area at the gear tooth interface, elimination or reduction of break-in requirements and the metal particles associated with this break-in, increased resistance to tooth bending fatigue, etc. There have been a good number of very positive articles in established race engineering magazines (racecar engineering, racetech, etc.). I think the benefits of this technology are starting to become well recognized among the racing community (and not so controversial as cryo tempering). This is why we've invested heavily recently to be able to offer the REM ISF process in-house. We've been utilizing this technology to enhance the RA gearsets for the past 3 years. Unfortunately most of our wholesale customers continue to buy untreated sets (to sell cheaper) and so we've had a chance to track the difference in failure rates between REM finished and unfinished and it is significant.

3. With regards to case flex on the 5MT. Case distortion is not something you are going to be able to see with the naked eye. It would have to be measured using strain gages (something we attempted at one time). Is it a major contributing factor to most gearbox failures? Unlikely. However, even still the 5MT case design is flawed. The forces being transmitted through the shaft support bearings can be extremely high and the 5MT case's longitudinally split design does not properly locate and support those bearings. This allows more relative movement between the gear teeth and deflection of the gear shafts. All bad for reliability. It is not uncommon to see noticeable fretting between the bearing outer races and their contact surfaces in the case. This could only come about if there was movement between these surfaces. I have never seen fretting of this type in a 6MT box.

--Dave
www.rallispec.com
Dave_RalliSpec is offline   Reply With Quote
Old 11-20-2007, 06:23 PM   #70
donkey lips
Scooby Newbie
 
Member#: 100505
Join Date: Nov 2005
Default

great stuff, um how many teeth are on an 02 wrx output shaft
donkey lips is offline   Reply With Quote
Old 11-21-2007, 06:11 PM   #71
lackofhp
Scooby Guru
 
Member#: 149001
Join Date: May 2007
Chapter/Region: TXIC
Location: Under-employed
Vehicle:
09 Caliber
ex 07 WRX

Default

and this is what it looks like when you shred 3rd like I did last week....



lackofhp is offline   Reply With Quote
Old 11-26-2007, 12:01 AM   #72
ButtDyno
Street's closed, pizza boy
 
Member#: 17301
Join Date: Apr 2002
Chapter/Region: MAIC
Location: Why do they always say the Evo
Vehicle:
is the "dark side"
06 Evo #7 STU, 03 IS300

Default

Quote:
Originally Posted by Unabomber View Post
It is important to note that as of March of 2002 (build date) the Subaru 5MT swapped over to RA width gears. If your transmission code is TY754VN2AA you have the narrow gears. If you have transmission code TY754VN2BA you have the wider gears. So many 2002 and some 2003 (model year) users switching to newer gears would not only get new gears, but stronger gears. All gears available through Subaru are now the newer RA width.
http://forums.nasioc.com/forums/show...4&postcount=34
Quote:
Originally Posted by WJM View Post
*stares into the latest parts catalog*

The main shaft (1st, 2nd and reverse are machined as part of the main shaft) from Feb 2002 to November 2006 production is the same. From Nov 2006 to June 2007 the part number changes from AB120 to AB240.

1st gear is AB741 from Sept 2000 until Dec 2002 production.
1st gear is AB011 from Oct 2002 until March 2004 production.
1st gear is AB230 from Jan 2004 until June 2007, the end of Impreza production.

Evidence shows that AB011 and AB230 are the strongest and produced in the same manner as the 'STi' and 'RA' gears....while the AB741 is produced the same way as all the other non-turbo gears.

2nd gear is the same from April 2002 until the end of Impreza Production is June 2007.

The 3-4 gear set remains the SAME part number from Feb 2002 production until the end of Impreza production in June 2007.

Something to thing about...
So - if I'm reading that post right, only 1st gear is RA width in the 03+ gearbox? The new part numbers came in at different times...

ButtDyno is offline   Reply With Quote
Old 11-26-2007, 08:45 AM   #73
WJM
Guest
 
Member#:
Default

Quote:
Originally Posted by ButtDyno View Post
http://forums.nasioc.com/forums/show...4&postcount=34


So - if I'm reading that post right, only 1st gear is RA width in the 03+ gearbox? The new part numbers came in at different times...

I'll post a list of part numbers from the start of production to the end. I just posted of when they did change from the 1st set.
  Reply With Quote
Old 11-26-2007, 09:15 AM   #74
WJM
Guest
 
Member#:
Default

The 5th gear set remains the same across all 2002~2007 WRX models.

WRX-TR is listed separately from WRX, however TR has the same gears as WRX per production date.

Here are the screen shots.

Mainshaft:



1st gear, driven:



2nd gear, driven:



3-4 set (all 3 come as a set, the mainshaft gears (2) and the driven gear (1) ):

  Reply With Quote
Old 12-16-2007, 06:40 PM   #75
slyde010105
Scooby Newbie
 
Member#: 166095
Join Date: Dec 2007
Question this might be a stupid question

This might be a stupid question, but i have asked a lot of people and i seem to get the dame reply. i really need a clutch for my 02 impreza wrx. and i was wondering if i get an aluminum billit flywheel, will i still be able to use the flywheel if i swap with the STI trans?
slyde010105 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
Differential FAQ: Read if you are thinking of upgrading! Unabomber Transmission (AT/MT) & Driveline 117 08-18-2014 12:58 AM
Injector, Fuel Pump, and Fuel Rail FAQ: Read if you are thinking of upgrading! Unabomber Newbies & FAQs 129 07-23-2014 07:45 PM
Turbo FAQ: Read if you are thinking of upgrading! Unabomber Newbies & FAQs 203 06-26-2014 12:11 PM
Suspension & Driveline FAQ: Read if you are thinking about upgrading! Unabomber Brakes, Steering & Suspension 82 05-06-2013 08:47 PM
Turbo FAQ: Read if you are thinking of upgrading! Unabomber Factory 2.0L Turbo Powertrain 70 06-19-2006 04:37 PM


All times are GMT -4. The time now is 09:58 AM.


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.