Welcome to the North American Subaru Impreza Owners Club Sunday July 5, 2015
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 07-16-2007, 02:12 PM   #1
sexyyrex
Scooby Specialist
 
Member#: 128022
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: Danbury, CT
Vehicle:
2011 Infiniti G37x
Sedan

Exclamation Attn: 06-07 Wrx Drivers

After reading multiple, multiple horror stories about the 06-07 wrx transmissions...i was wondering who has had any problems/no problems of any kind with theyre 06-07 wrx tranny....and what have you PERSONALLY done to fix it...not your friend...not your brother or your cousin, you, this thread is for the 06-07 WRX drivers and theyre own stories...

personally...i have grinded 3rd two or three times since i have had the car...the car that i bought in july of 06 has 23k miles with no tranny fluid change, so im running the stock fluid...

please post whether you have mods or not, and if you have problems or not

really looking for other stories of anyone in here, and the truth is a MUST...

Thanks
* Registered users of the site do not see these ads.
sexyyrex is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-16-2007, 02:34 PM   #2
bluemax189
Scooby Specialist
 
Member#: 137405
Join Date: Jan 2007
Chapter/Region: MAIC
Location: Baltimore
Vehicle:
2011 WRX
20g

Default

Stock TD04 running 18lbs with accomidating mods. No problems at all with the trans yet, no grinding or anything. I really only get on it occasionally and only in third gear when i decide to really pull onto the highway.
bluemax189 is offline   Reply With Quote
Old 07-16-2007, 02:48 PM   #3
waktasz
Scooby Guru
 
Member#: 86356
Join Date: May 2005
Chapter/Region: Tri-State
Default

waktasz is offline   Reply With Quote
Old 07-16-2007, 03:00 PM   #4
sexyyrex
Scooby Specialist
 
Member#: 128022
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: Danbury, CT
Vehicle:
2011 Infiniti G37x
Sedan

Default

Quote:
Originally Posted by waktasz View Post
yes but im looking for ALL the details, he just wants to see yer mods and yer power, im looking for alllll problems, grinding, blown 3rd...anything, any problems at all, im looking for details details details...
sexyyrex is offline   Reply With Quote
Old 07-16-2007, 04:48 PM   #5
jshaun29
Scooby Newbie
 
Member#: 154161
Join Date: Jul 2007
Default

I hope there isn't problems, I just got an '06'
jshaun29 is offline   Reply With Quote
Old 07-16-2007, 05:18 PM   #6
Paintballguy
Scooby Specialist
 
Member#: 77810
Join Date: Dec 2004
Chapter/Region: MAIC
Location: Pasadena, MD
Vehicle:
2006 Evo IX SE
Tarmac Black

Default

I grenaded 3rd gear in my 06 wrx and got a ppg dogbox to fix it.
Paintballguy is offline   Reply With Quote
Old 07-16-2007, 05:27 PM   #7
Black-Falcon
Scooby Specialist
 
Member#: 106318
Join Date: Jan 2006
Chapter/Region: SWIC
Location: AZ
Vehicle:
14 Cadirrack
ATS

Default

You were running a 20G right?
Black-Falcon is offline   Reply With Quote
Old 07-16-2007, 06:03 PM   #8
Paintballguy
Scooby Specialist
 
Member#: 77810
Join Date: Dec 2004
Chapter/Region: MAIC
Location: Pasadena, MD
Vehicle:
2006 Evo IX SE
Tarmac Black

Default

Quote:
Originally Posted by Black-Falcon View Post
You were running a 20G right?
yea 20g on 93+meth. 380whp 390ft/lbs
Paintballguy is offline   Reply With Quote
Old 07-16-2007, 06:31 PM   #9
sexyyrex
Scooby Specialist
 
Member#: 128022
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: Danbury, CT
Vehicle:
2011 Infiniti G37x
Sedan

Default

Quote:
Originally Posted by Paintballguy View Post
yea 20g on 93+meth. 380whp 390ft/lbs
thanks paintballguy....how long did that last on the stock tranny? and what was the car doing when it blew?
sexyyrex is offline   Reply With Quote
Old 07-16-2007, 06:39 PM   #10
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
08 Corvette Z06
problem Traction?

Default

the 1/2 gears on the 06/07 seem to be stronger... the 3rd gear is the new culprit...
All4bSpinnin is offline   Reply With Quote
Old 07-16-2007, 08:13 PM   #11
Dana Daray
Scooby Specialist
 
Member#: 136912
Join Date: Jan 2007
Chapter/Region: SCIC
Location: Vista, Ca
Vehicle:
2006 Sti
OBP

Default

blew 3rd with 7500 miles on the clock. I like doing 2nd and 3rd gear pulls, the gears don't seem to like it as much as I do. Pulled the crap out, sent it to andrewtech, and installed the godsend....ppg 1-4's. I had about 300 whp 300ft/lb or torque when I ripped 3rd apart.
Dana Daray is offline   Reply With Quote
Old 07-17-2007, 01:33 AM   #12
ExpO
*** Banned ***
 
Member#: 115819
Join Date: May 2006
Chapter/Region: Tri-State
Location: UDel, illidelphia
Vehicle:
2006 vf39 R0mRa1DeR
Darknessess Wagon

Default

I have a 2006 wagon, it was stock until... somewhere around 28k when I went to a TurboXS Stealthback w/ Cobb AP V1 Stage 2 map, and later added a 3" wbr axleback. Car was fine for a few thousand miles...

Prior to going stage 2 I took the car to the track but didn't launch the hell out of it. The car has plenty of hard 1-2 shifts and launches on it, and no bad grinds.

A few thousand miles after going stage 2, 3rd gear blew up while I was cruising.

I spent a few weeks researching all the options, and decided on dropping the trans with the help of a friend, then sending it out to andrewtech for 1-4 PPG Helical Syncro gears and a 3.9 final drive swap.

I now have a few thousand miles on the PPG's and they're doing great. The sound is perfect and the new final drive + ratios are great.

Now i've got a dead clutch, and i'm waiting waiting and waiting for an exedy stg 1.
ExpO is offline   Reply With Quote
Old 07-17-2007, 07:18 AM   #13
untuchablez_WRX
Scooby Newbie
 
Member#: 153890
Join Date: Jul 2007
Chapter/Region: BAIC
Location: Modesto,CA
Vehicle:
2007 Subaru WRX/STI
Satin White Pearl

Default

Seems like the WRX Transmission can go at anytime, We 2.5L make so much damn TQ the transmissions deff dont like it.
From driving hard to 3rd gear blowing out, to just crusing around and switching lanes in traffic and 3rd gear blows. Just seems like a ticking time bomb =(

Then again there are other people with plenty of launches and good driving on their WRX Transmissions with 270-320WHP and they have been holding ground so far.

Once I upgrade to better gears in my 07 WRX, It will be a big load off my cheast, I know that for shure!
untuchablez_WRX is offline   Reply With Quote
Old 07-17-2007, 08:23 AM   #14
juanmedina
Scooby Guru
 
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:
07 FPgreen 7.37@95
WRX VF39+E85 12.0, 121mph

Default

I have an 07 wrx tr with about 7000 miles. I have a cobb ap, TBE catless. I money shifted at 1000 and later at 5000 miles the transmission seems fine. I was going to get some Gram light optimise, but not anymore i'm now saving for a tranny. I'm being very careful with 3rd.
juanmedina is offline   Reply With Quote
Old 07-17-2007, 08:28 AM   #15
Woodward
Scooby Specialist
 
Member#: 102424
Join Date: Dec 2005
Chapter/Region: BAIC
Location: Patterson, CA
Vehicle:
2003 Tundra
GrEy

Default

I had a vf39 w/ cobb & ST for EM. Pushing 16.2psi and busted 3rd while getting on it starting in 2nd one night.

I'm ordering all the parts today incl. LegacyGT gears as an upgrade... for now. I want to go PPG sometime soon though.
Woodward is offline   Reply With Quote
Old 07-17-2007, 10:16 AM   #16
juanmedina
Scooby Guru
 
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:
07 FPgreen 7.37@95
WRX VF39+E85 12.0, 121mph

Default

Quote:
Originally Posted by Woodward View Post
I had a vf39 w/ cobb & ST for EM. Pushing 16.2psi and busted 3rd while getting on it starting in 2nd one night.

I'm ordering all the parts today incl. LegacyGT gears as an upgrade... for now. I want to go PPG sometime soon though.
I though the legacyGT gears were as strong as the 06-07 gears, with a different final drive ratio?
juanmedina is offline   Reply With Quote
Old 07-17-2007, 11:58 AM   #17
sexyyrex
Scooby Specialist
 
Member#: 128022
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: Danbury, CT
Vehicle:
2011 Infiniti G37x
Sedan

Default

with all of this being said...how many have SUCCESSFULLY been stage 2 under normal/spirited driving....how many have tracked it...and whats the average cost one would spend on a whole rebuild?
sexyyrex is offline   Reply With Quote
Old 07-17-2007, 12:05 PM   #18
mxturboracer86
Scooby Specialist
 
Member#: 82398
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2008 STi
555 Motorsports

Default

Quote:
Originally Posted by juanmedina View Post
I though the legacyGT gears were as strong as the 06-07 gears, with a different final drive ratio?
did some research

Last edited by mxturboracer86; 07-17-2007 at 03:07 PM.
mxturboracer86 is offline   Reply With Quote
Old 07-17-2007, 02:22 PM   #19
jhargis
Scooby Specialist
 
Member#: 110304
Join Date: Mar 2006
Location: Crestline, CA
Vehicle:
2004 Volvo S60R
No more Subie

Default

And I dunno why people keep opening their mouths without having any understanding of basic physics or before doing any research.

WRX ratios have an awkwardly long rpm drop between 1st and 2nd gears, and 2nd to 3rd could be a bit closer as well. The LGT ratios are a much better match to each other as far as the ratios go, as they are more evenly spaced... in other words you get a similar rpm drop in each gear. How does that make things stronger? Because the larger the rpm drop in between gears the harder you are hammering the gears with the weight of your flywheel.
Lower rpm drop = less shock load. Why? Because slowing the flywheel down by 1500rpm dissapates less energy into the gears than slowing that same flywheel down by 2000rpm (assuming the same clutch actuation and type).

The LGT gears are also a little bit thicker at the roots of the gear teeth in the lower gears.

The LGT/standard STI 5mt (non-RA) gearset is not a huge jump in strength, but it is stronger, and just the better gear ratios alone are well worth it. These gearset came from the factory, at one time, with a weaker case AND ~275 crank HP, and they seemed to hold together reasonably well. Keep in mind that pretty much any factory 5mt gearset is perfectly breakable if you try to break them. PPGs are in a different league as far as tooth profile and root width goes, but they are also expensive and noisey.

Last edited by jhargis; 07-17-2007 at 02:33 PM.
jhargis is offline   Reply With Quote
Old 07-17-2007, 02:31 PM   #20
keaniegenie
Scooby Specialist
 
Member#: 94494
Join Date: Aug 2005
Chapter/Region: NWIC
Location: Seattle
Vehicle:
2005 Element 92x
Black

Default

As far as I'm concerned, the newer WRX boxes are the same as the older ones with a 3.7 final drive and a push-style clutch(older I mean the mid 03+ WRX's). The ratios and gear I thought were identical to older WRX's.

It's typical for all WRX's to be weak on shifting to 2nd or 3rd. Like Jhargis said, it's the strain you put on the gear if the ratios are farther.

Think of a 10-speed bike. If you're riding up a hill in 10th, not only is it harder on your legs, but it's harder on the gear teeth since they're abosrbing so much more torque to turn the wheels.

This is why people who own Forestors don't complain of broken gearboxes. Forestor XT's come with the same gearbox as a WRX but with a 4.44 final drive. The super short final drive keeps the strain on the gears to a minimum since the ratios are close and short.

Same with Outback XT's. These have the same gearboxes as Legacy GT's but with a 4.44 final drive. Hell, even the Legacy GT owners don't seem to have many issues with a 4.11 final drive.

The 06+ WRX gearbox is the 2nd worst 5mt Subaru made behind the old WRX boxes that had tiny gears. This time, it's the bigger engine+ AVCS combined with the 3.7 final drive. I believe the bumped up the final drive to get the MPG lower when they increased the displacement.
keaniegenie is offline   Reply With Quote
Old 07-17-2007, 02:38 PM   #21
mxturboracer86
Scooby Specialist
 
Member#: 82398
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2008 STi
555 Motorsports

Default

Quote:
Originally Posted by jhargis View Post
And I dunno why people keep opening their mouths without having any understanding of basic physics or before doing any research.

WRX ratios have an awkwardly long rpm drop between 1st and 2nd gears, and 2nd to 3rd could be a bit closer as well. The LGT ratios are a much better match to each other as far as the ratios go, as they are more evenly spaced... in other words you get a similar rpm drop in each gear. How does that make things stronger? Because the larger the rpm drop in between gears the harder you are hammering the gears with the weight of your flywheel.
Lower rpm drop = less shock load. Why? Because slowing the flywheel down by 1500rpm dissapates less energy into the gears than slowing that same flywheel down by 2000rpm (assuming the same clutch actuation and type).

The LGT gears are also a little bit thicker at the roots of the gear teeth in the lower gears.

The LGT/standard STI 5mt (non-RA) gearset is not a huge jump in strength, but it is stronger, and just the better gear ratios alone are well worth it. These gearset came from the factory, at one time, with a weaker case AND ~275 crank HP, and they seemed to hold together reasonably well. Keep in mind that pretty much any factory 5mt gearset is perfectly breakable if you try to break them. PPGs are in a different league as far as tooth profile and root width goes, but they are also expensive and noisey.
here is what i found in my research

06-07 LGT
1st 3.166
2nd 1.882
3rd 1.296
4th .972
5th .738
final reduction 4.111

07 WRX
1st- 3.454,
2nd-2.062,
3rd- 1.448
4th- 0.88
5th- 0.78
Final 3.0

06 WRX
1st- 3.454,
2nd-1.947,
3rd- 1.366,
4th- 0.972
5th- 0.738,
final 3.7

and N/A 06-07LGT
1st 3.454
2nd 2.062
3rd 1.448
4th 1.088
5th .780
final 3.90

Then 08 wrx
1st 3.166,
2nd 1.882,
3rd 1.296,
4th 0.972,
5th 0.738,
final 3.900

all the info is from the same source cars101.com

either way what this tells me after double checking everything is that they have been experimenting over the past few yrs and as you can see the new wrx uses the LGT gears instead of like the 07 wrx which uses the equilvalent gearing of an N/A Legacy tranny, as for 06 seems like they tried a combo of the 2 gearsets the n/a and the turbo legacy tranny.

as far as the LGT gears being beefier its possible, but if you look at the RA gears or any other gears of the caliber they are still called weak by ppl who dont kno how to drive and keep breaking gears. The poitn i'm making regardless of what subaru has been trying for the past 3 yrs is you can make these trannies handle power you just have to kno how to drive and i wouldnt go so far as to say be careful but to say kno what you can and cant do with the tranny

Last edited by mxturboracer86; 07-17-2007 at 03:10 PM.
mxturboracer86 is offline   Reply With Quote
Old 07-17-2007, 03:51 PM   #22
juanmedina
Scooby Guru
 
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:
07 FPgreen 7.37@95
WRX VF39+E85 12.0, 121mph

Default

Quote:
Originally Posted by mxturboracer86 View Post
here is what i found in my research

06-07 LGT
1st 3.166
2nd 1.882
3rd 1.296
4th .972
5th .738
final reduction 4.111

07 WRX
1st- 3.454,
2nd-2.062,
3rd- 1.448
4th- 0.88
5th- 0.78
Final 3.0

06 WRX
1st- 3.454,
2nd-1.947,
3rd- 1.366,
4th- 0.972
5th- 0.738,
final 3.7

and N/A 06-07LGT
1st 3.454
2nd 2.062
3rd 1.448
4th 1.088
5th .780
final 3.90

Then 08 wrx
1st 3.166,
2nd 1.882,
3rd 1.296,
4th 0.972,
5th 0.738,
final 3.900

all the info is from the same source cars101.com

either way what this tells me after double checking everything is that they have been experimenting over the past few yrs and as you can see the new wrx uses the LGT gears instead of like the 07 wrx which uses the equilvalent gearing of an N/A Legacy tranny, as for 06 seems like they tried a combo of the 2 gearsets the n/a and the turbo legacy tranny.

as far as the LGT gears being beefier its possible, but if you look at the RA gears or any other gears of the caliber they are still called weak by ppl who dont kno how to drive and keep breaking gears. The poitn i'm making regardless of what subaru has been trying for the past 3 yrs is you can make these trannies handle power you just have to kno how to drive and i wouldnt go so far as to say be careful but to say kno what you can and cant do with the tranny

The gear ratios on the 07 WRX are all wrong they are the same as the 06 WRX, it is mistake from car101.com. I can't believe they have not fix it yet .
juanmedina is offline   Reply With Quote
Old 07-17-2007, 04:59 PM   #23
mxturboracer86
Scooby Specialist
 
Member#: 82398
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2008 STi
555 Motorsports

Default

Quote:
Originally Posted by juanmedina View Post
The gear ratios on the 07 WRX are all wrong they are the same as the 06 WRX, it is mistake from car101.com. I can't believe they have not fix it yet .
ah... i kno the final drive was off, but i could swear they changed 3rd and 4th from 06 to 07 and lowered the F/D
mxturboracer86 is offline   Reply With Quote
Old 07-17-2007, 05:34 PM   #24
jhargis
Scooby Specialist
 
Member#: 110304
Join Date: Mar 2006
Location: Crestline, CA
Vehicle:
2004 Volvo S60R
No more Subie

Default

I don't trust cars101.com as that site is plain wrong and has cause plenty of confusion in posts that I have seen in this forum.

ALL US Market WRXs have the same ratios 1st through 5th. In '06 they changed the final drive from 3.90:1 to 3.70:1. The correct ratios for all of these are:

1st 3.454
2nd 1.947
3rd 1.366
4th 0.972
5th 0.738
'02-05 FD - 3.90
'06-07 FD - 3.70

IF that figure for the '08 is correct, then it appears that Subaru have more or less put the LGT driveline into the newest WRX. The engine is very similar, and if this is correct, then the gearbox is probably from the LGT.

I don't know of a N/A Legacy GT... I think you meant "Legacy" on that one.
jhargis is offline   Reply With Quote
Old 07-17-2007, 05:39 PM   #25
mxturboracer86
Scooby Specialist
 
Member#: 82398
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2008 STi
555 Motorsports

Default

you are correct i meant N/A legacy
mxturboracer86 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
WTB: 06/07 STi Driver Airbag, 06/07 impreza model Driver Seatbelt, 06/07 WRX Fenders moose00015 Private 'Wanted' Classifieds 2 07-12-2009 05:37 PM
WTB: 06/07 wrx Driver side headlight housing RallyDude87 NWIC Private Classifieds 3 03-31-2009 10:29 AM
WTB - 06/07 Wrx Driver front fender, Left headlight, and possiably front bumper. Niblaze Tri-State Area Private Classifieds 2 08-21-2008 12:09 PM
WTB : 06-07 wrx driver headlight new06 Private 'Wanted' Classifieds 1 05-22-2008 09:02 PM
Black leather 06-07 wrx driver seat. aclver1 Private 'Wanted' Classifieds 0 11-06-2007 06:31 PM


All times are GMT -4. The time now is 04:14 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.