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Old 10-20-2008, 04:15 PM   #101
daWagon
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Well my tranny is an 07, but the DS was damaged in the accident (came from a totaled STI) so the salvage shop sourced another one since it was a package deal. I googled "STI Drive Shaft" and ended right back on NASIOC .. funny how that happens .. anyway, I guess my DS could be and 04 or 05:

http://images.google.com/imgres?imgu...icial%26sa%3DN
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Old 10-20-2008, 05:34 PM   #102
WRX-17
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hmm well then i dont know what to tell you on that one then. i would go by the white paint and the counter weights and if u notice a lot of vibration at highway speeds then i would try flipping it the other way. i dont know how else you would figure it out. good luck
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Old 11-26-2008, 09:46 PM   #103
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Quote:
Originally Posted by WRX-17 View Post
FAQ: USDM STi 6MT Swap into a WRX


1) Thanks to Bayley for pioneering this route so a 6MT swap was actually feasible for most. This parts list includes:
• Tranny
• 6MT clutch fork
• Auto driveshaft or STi ds and enlarge the holes on the ds and yoke or switch the yoke on the R160 to the bigger R180 yoke if you can get one.
• Put 3.90 gears in your R160 Differential (if using an 06-07 tranny with an 02-05 R160 there is no need to change anything with the differential)
• Reuse your WRX axles
• STi shifter linkage
• 6MT tranny mount (5MT and 6MT mounts are different)
• DCCD controller (optional, but recommended)

Are all yokes interchangable? I did the 6spd swap to my 2002 WRX while retaining the Stock rear diff. I recently had a problem with the bolts that hold the yoke (WRX DIFF) and STI driveshaft comming loose. I drilled out the inner diameter to fit the bolts but They are at an angle and get loose after some driving.
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Old 11-27-2008, 03:54 AM   #104
aboothman
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+1 for swapping the flange, and leaving the driveshaft alone! It took me 15 minutes, and I have no issues with bolts coming out. Loose driveshaft = scary!!
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Old 12-02-2008, 02:28 AM   #105
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all this info about the swap, can someone just clear this up for me... i have a 02 wrx, I'm buying a new 07 sti tranny, i already have an aftermaket clutch and flywheel for the 5mt trans, can i use that clutch with the sti trans using the 6 speed clutch fork?
*Also can i just simply have my drive shaft shortened 2.5 inches and balanced or is the 5mt splines different than the sti trans? or the auto shaft the best route.
*and with the 07 sti trans, i will have to get different front axles since mine are female in my 02 wrx... Which front axles do I need to get?
I just want to be sure before i buy the rest of the parts for my swap. Thanks.
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Old 12-02-2008, 02:00 PM   #106
WRX-17
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I explained the use of the clutch in my FAQ.
Technically you could just shorten the wrx driveshaft, but unless you do it right and have it rebalanced as well its not worth it. not to mention that the sti ds is much stronger...look at the pic in my post #98 that i posted, you can see that the joints are beefier. or just go with the auto ds which ever one, but i would rather you not cut the wrx one just for possible issues.
and once again i explained the axle issues in my FAQ.
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Old 12-02-2008, 02:45 PM   #107
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Aside from finding an auto driveshaft, swapping the companion flange on the rear diff is the easiest and cheapest way to go.

It took me 15 minutes with an impact gun...that includes taking the flange off of my R180, and bolting the driveshaft back up.

Sorry to sound like a broken record, but this info is all over the place now...swapping the flange is easy, cheap and safe.
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Old 12-03-2008, 01:34 AM   #108
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Quote:
Originally Posted by TyConway View Post
*and with the 07 sti trans, i will have to get different front axles since mine are female in my 02 wrx... Which front axles do I need to get?
Get stubs and circlips so you can reuse your axles.

Early 2004 Axle Seal Part Numbers:
Left: 806730041 x1
Right: 806730042 x1

Axle Stub Part Number:
38415AA110 x2

Circlip Part Number:
805329010 x2
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Old 12-15-2008, 12:11 AM   #109
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I've been searching for the last few days and either I'm blind or the info is buried deeper somewhere. I'm currently swapping an 05 STI trans. into my 02 WRX (manufactured 03/01). I have 3 rear diffs. The stock 02, 05 STI and an older imprezza diff. Is there a casting number on the diff case to tell me what year the imprezza diff is? I thought 02's had LSD's. I pulled the back cover and mine appears to be an open diff. It has, in white, 329A painted near the flange and EF on the top towards the back.

Ultimately, I need to keep my stock hubs.

Since the axels are different for the STI and I've already sold them anyway, are there stubbies for the rear so you can keep your stock WRX's? I sent an e-mail to gearboxtech.com to see what their kit is comprised of bvut it sounds like you need STI and WRX axels to make it work (from an earlier post somewhere, I haven't heard from gearbox yet).
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Old 12-15-2008, 03:56 AM   #110
penusai
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apparently, you haven't done much searching.

or you're just bad at it.

or you didn't do any searching or reading.

from the OP of this thread...

Quote:
Originally Posted by WRX-17 View Post
FAQ: USDM STi 6MT Swap into a WRX

R160 – 52lbs. WRX rear differential. It has a viscous LSD which is no better than an open differential since the unit is so tiny in this diff.
02-05 have a 3.54 gear ratio
06-07 have a 3.70 gear ratio
R160’s on 2.2L Legacy/Impreza’s have a 3.9 gear ratio

R180 – 64lbs. STi rear differential. It has a mechanical clutch type LSD.
04-05 R180’s have a 3.90 gear ratio
06-07 R180’s have a 3.54 gear ratio

What are my options for doing a 6MT swap?

1) Thanks to Bayley for pioneering this route so a 6MT swap was actually feasible for most. This parts list includes:
• Tranny
• 6MT clutch fork
• Auto driveshaft or STi ds and enlarge the holes on the ds and yoke or switch the yoke on the R160 to the bigger R180 yoke if you can get one.
• Put 3.90 gears in your R160 Differential (if using an 06-07 tranny with an 02-05 R160 there is no need to change anything with the differential)
• Reuse your WRX axles
• STi shifter linkage
• 6MT tranny mount (5MT and 6MT mounts are different)
• DCCD controller (optional, but recommended)

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Old 12-15-2008, 09:47 AM   #111
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apparently, you haven't done much searching.

or you're just bad at it.

or you didn't do any searching or reading.

from the OP of this thread...





Ummmm, yeah, thanks
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Old 12-28-2008, 01:08 AM   #112
pana24
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there is a lot of info to digest in regards doing this swap... but is helpful, thanks for taking your time in doing this
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Old 12-28-2008, 02:39 AM   #113
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Quote:
Originally Posted by aboothman View Post
Aside from finding an auto driveshaft, swapping the companion flange on the rear diff is the easiest and cheapest way to go.

It took me 15 minutes with an impact gun...that includes taking the flange off of my R180, and bolting the driveshaft back up.

Sorry to sound like a broken record, but this info is all over the place now...swapping the flange is easy, cheap and safe.
Anyone happen to have a part number for this flange? I have both a WRX auto and STi driveshaft. I am using my auto WRX one right now, but if it is a worthwhile upgrade I may throw the STi one on.
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Old 12-28-2008, 10:12 PM   #114
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Is it possible to swap a 3.90 04-05 sti trans and 3.90 R180 into an 02 WRX while keeping the wrx hubs and brakes?

If so what would be used? Or is it imperative that I have the 04 4x100 sti hubs? I want to keep my stock brakes since I'm on a budget.


Jerod
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Old 01-13-2009, 08:05 AM   #115
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Afaik, the only option would be conversion axles from Gearboxtech or DSS.
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Old 01-13-2009, 12:27 PM   #116
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true but they stopped making those, atleast DSS did the last i checked.
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Old 01-13-2009, 03:02 PM   #117
aboothman
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Quote:
Originally Posted by v8eaterWRX View Post
Anyone happen to have a part number for this flange? I have both a WRX auto and STi driveshaft. I am using my auto WRX one right now, but if it is a worthwhile upgrade I may throw the STi one on.
I do not have a part number, at least not without going to my garage, but here is the page from SubaruGenuineParts.com OEM catalog:

Companion Flange

I will post up the actual part number later, depending on my memory
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Old 01-17-2009, 03:00 AM   #118
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I've got a question that's most likely been covered but I just can't seem to find the answer.

I have an rs that I'm planning on swapping a 05' sti drivetrain in. However, I would like to retain the 5X100 hubs so I can keep my wheels and suspension, is it possible to use the 04' sti hubs with the 05 sti transmission and rear diff? What do I have to do to make it work?

Thanks.
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Old 01-17-2009, 12:24 PM   #119
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I know you want to but dont be cheap, do it right. The only way to do that is to use 05 tranny and diff and 04 axles and hubs. You will have to put in some axles stubs in the tranny for the female 04 axles and change the axles seals. You can do it like that but it really defeats the purpose of an sti swap since ur using the weak 04 bearings and hubs and axles and the 5x100 pattern which has much less wheel choices. Thats totally your call on which route you want to take, but its a no brainer IMO.
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Old 01-17-2009, 02:46 PM   #120
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Well would using axle stubs (which are like adapters I assume) would I be risking it by relying on the integrity of those stubs? Could they break? I know that the 5X114.3 have stronger bearings and whatnot, but I just spent over $2000 dollars on my suspension and another 1200 on my wheels and tires. This is a budget build, so these things have to be put into consideration. Also, sure I can get more wheels in the 5X114 offset but I also have RS fenders to consider and my wheel options are limited enough as it is. I have 04 sti bbs's right now and I really like them, I don't have the money to invest in new wheels and tires (obviously I could sell mine but it's also a risk and I will realize losses when I sell my parts.)
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Old 01-17-2009, 03:29 PM   #121
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I'm not the one to ask on actually strength comparisons and numbers. The stubs are strong and I wouldnt say you are at risk of breaking them. I understand that you wouldnt want to have to change those things as well. The wheels since they are stock I doubt you would lose much at all especially if u just went from 04 to 05 bbs's but you would probably lose on the suspension. I understand your situation and it can be done, I think its less than ideal so I personally wouldnt do it and didnt, but its obviously totally your call. Im just tryin to put in my buck o' five...The route you are asking about would work and unless ur putting a lot of power through it i guess i wouldnt worry about it
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Old 01-17-2009, 03:48 PM   #122
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Hey, don't get me wrong, I totally appreciate the information and your viewpoint. Thanks! We'll see what happens, I'm not totally sure I'm getting it or not, just weighing out my options, I probably will end up just staying 05 though.
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Old 02-21-2009, 01:31 PM   #123
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Nevermind.

Last edited by 02CWRX; 02-22-2009 at 02:28 PM.
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Old 02-22-2009, 06:29 AM   #124
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Quote:
Originally Posted by WRX-17 View Post
I know you want to but dont be cheap, do it right. The only way to do that is to use 05 tranny and diff and 04 axles and hubs. You will have to put in some axles stubs in the tranny for the female 04 axles and change the axles seals. You can do it like that but it really defeats the purpose of an sti swap since ur using the weak 04 bearings and hubs and axles and the 5x100 pattern which has much less wheel choices. Thats totally your call on which route you want to take, but its a no brainer IMO.

I've got an 06 6 spd and rear diff I want to swap into my rs. I just bought new suspension and wheels as well. Can I swap stubs and seals and just use 04 parts with the 06 tranny? Just to be clear I can use the 06 rear axles with 04 hubs and have to use 04 axles,hubs,change stubs and seals for the front? Will any sti driveshaft work with the 06 tranny and rear diff?
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Old 03-04-2009, 05:46 PM   #125
GullyWagon07
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Companion flange, impreza, 2.5l, w/o sti, w/wrx 04-07 $111.75 $81.80



there are 5 different companion flanges? which one do i need? the one above correct? please?
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