Great work!

 

Thanks! You need the 6MT drive shaft for the first list, it's listed below the shift linkage.

 

Fuuuuu read it 3 times too and still missed it! Don't mind me then!

Can you also use the 4EAT GC driveshaft? I thought they were the same length?

 

You can use a 4eat gc shaft if you are using an r160 (option 3).

 

^^ True story, that's what I'm running =)

 

And that's what I plan on running. It will probably end up being sooner rather then later. Haha

Nice write up!

 

*Note: Depending on the transmission you are swapping in, you may need to purchase axle stubs, seals, and circlips to mate your female axles to your female transmission. This essentially converts your '05-'07 female transmission to a male transmission that will mate to GC female front axles. The following part numbers are here:
Early 2004 Axle Seal Part Numbers (to be used with axle stubs / female axles):
Left: 806730041
Right: 806730042
Circlips (You need two of these): 805329010
Axle Stubs (You need two of these): 38415AA110

Since the axle stubs are removeable, it is possible to purchase an 04 STi transmission and have the axle stubs missing as was my case.

 

Ouch, that's a bummer... I'll add a note to that. Thanks.

 

THANK YOU!!! Awesome source of good info. I've been reading stuff scattered around various threads for a few days now. PLEASE, make this sticky.


I don't suppose you could add the info for the "custom" coil-over setup for using 05-07 hubs?

 

No problem. Updated with final drives and a little more organization and detail.

 

VERY Well put!!
I'm doing the 3rd Option - STi/WRX Hybrid driveline swap

So here's my dilemma; I have an 05 STi transmission (female) and since those axles (male) don't work in my stock RS hubs, I want to go with my stock RS axles (female). East Coast Swappers was one of the places that told me to purchase the axle stubs, seals, and circlips. Like I mentioned in my post, I just tried swapping the STi stubs to the RS stubs. no such luck.

I got the impression that these stubs would go on to the female axles themselves. But it seems like your write up here is implying to add them to the transmission side. Am I reading that correctly?

 

Yes, the axle stubs, seals, and circlips actually go into the transmission to allow you to use the female axles. They replace the existing axle seals that are in the female transmission.

 

Gotcha! Ok I understand. I tried calling a couple subie dealerships this morning. Both had the seals, but would have to order the circlips and stubs. Stubs being around $50 each (woah).

This morning I also pulled apart my old front LSD and put the stubs on my female RS axles, but the circlip position/thickness is a lot different than the STi stub (yet another fail).

I found a local guy who is willing to sell me his '06 WRX Axles (male). Question to you is, would they fit my RS?

It looks like they would, but I'm a little nervous since nothing else I've done is working.

Here is a comparison I found of an '06 WRX Axle (top) and I'm assuming '06 STi axle (bottom). Can you verify if it'll work or if they are too big/too long for my RS hubs?

Thanks!!

 

Do these stubs normally come with the transmission? If not where can I acquire some i'm looking to do the same thing!

 

The stubs only come standard with the '04 STI trans. For a different year, you'll have to order the provided part numbers from a Subaru dealer.

 

The 5MT axle stubs are different from the 6MT stubs.

As far as the axles go, the WRX axles will likely fit, but I can't say for certain. However,the sedan WRX axles are longer than the GC axles, and might wear faster due to the CV joints being constantly at harder angles. I would recommend going the route of the stubs.

 

Clutch/Flywheel/Pressure Plate/Slave cylinder notes:
It is possible to use an '02-05 WRX pull style slave cylinder, clutch, flywheel, and pressure plate with a six speed swap, but since the RS is a push style system, you would have to source these parts anyway, as none of it could be reused.

So basically if you're switching from a jdm 5spd all you need is the trans/mount/linkage, 4eat shaft, matching diff ratio, and maybe stubs?

This would be too easy for me to pass on. Thanks for the awesome writeup, sticky for sure. Here are all the six speed codes;

Master 6 Speed Transmission Decoder Ring - NASIOC

 

Provided your JDM 5 speed trans is a pull type clutch, you're correct. And thanks for the trans code link, I added that to the post

 

Subbed for a later date!

 

What about the 08 transmissions is there any thing different can you still put the 04 axle stubs in them?

Sent from my PC36100 using Tapatalk 2

 

Axle stubs will work.

The big difference between the '08+ transmissions is the lack of a vehicle speed sensor. The newer cars rely on CANBUS to get speed info from the ABS system. This can be remedied with VSSPro (VSSPro [DCCD_Vss] - $150.00 : DCCDPro, Active Center Diff Control!). I'm not sure if there are any competing products.

 

What about for early cars with the cable speedo any info on that I'm about to get a killer deal on this 08 trans so I don't want to screw my self not much info on the later 6 speeds thanks for your help

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Per our conversation about swapping out the STi trans neutral and reverse light wiring with the RS trans wiring:

I went to the transmission shop and the guy said he had no wiring like that and he doesn't remember seeing anything like that when taking my trans apart. My question is, my old trans was a v3 JDM 5speed. Would that have anything to do with not having those wires there? I assumed those trannys were pretty similar to the USDM ones.

 

What did you have for a neutral and reverse switches on the 5 speed? Those should swap in.

 

Honestly, I'm not completely sure. Hopefully someone else can chime in, but I would see not working at all unless you converted to an electronic speedometer.

The reason '08+ transmissions are killer deals is that they're harder to get working in the older Imprezas.

 

I have a question about 6 speed transmissions.

If you had a full non-DCCD 6 speed (ver7) transmission and drivetrain and wanted to change to a DCCD 6 speed (ver8) transmission. Would you just have to change just the transmission or would you have to change the whole drivetrain?

 

That depends on the situation. Verify that the final drives are the same. If they are, you only need to swap the trans, and worst case, the axle stubs if you need them.

Another way to do it would be to swap center diffs. You could swap the DCCD for the open diff.