sti tranny swap 02 wrx?
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Registered User
Joined: Jul 2005
Posts: 111
From: CT
Car Info: 05 WRX
sti tranny swap 02 wrx?
is it possible to swap the new sti tranny into the wrx relatively easy or is it hard and expensive. I've heard the the stock wrx tranny is not strong if you push the car hard alot and I was a track/daily driver and I know the sti tranny is stronger and don't know of any aftermarket performance trannys. thanks for any help
Registered User
Joined: Mar 2004
Posts: 207
From: Arizona
Car Info: 98/05 RSTi
it bolts up.
You just need a new shorter driveshaft, 3.90 rear ring and pinion gears for the rear diff.
I'd suggest a lighter flywheel.
It's not a cheap switch, but the 6-MT works better; I love the way mine runs.
Good luck
You just need a new shorter driveshaft, 3.90 rear ring and pinion gears for the rear diff.
I'd suggest a lighter flywheel.
It's not a cheap switch, but the 6-MT works better; I love the way mine runs.
Good luck
Registered User
Joined: Dec 2004
Posts: 287
From: Saugus, MA
Car Info: 2001 WRB 2.5RS, Gold Prodrive P1's, Stromung Dual Tip, AEM SRI, Pink "i" fornt badge
ill be interested in your wrx tranny I have a '01 2.5RS (4eat)....
Last edited by SubieStylez; Aug 25, 2005 at 08:01 AM. Reason: .
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Joined: Jul 2005
Posts: 5
I thought the front axles were different too... like in a new axle/hub/suspension kind of way. Everything STI is beafier too so I'm not sure it'd be a hot idea to use WRX rear diff. Proper way to do it would be to do everything from the STI. But if expensive was a problem in the first place then take into consideration the STI transmission is going for like 5 grand or something outrageous these days. I mean I heard it's a good transmission and all but they're not cheap.
Registered User
Joined: Mar 2004
Posts: 207
From: Arizona
Car Info: 98/05 RSTi
you can use the 180 axels, but that requires alot more cost. you have to change the axel hubs i believe.
you CAN use the WRX axel shafts and the WRX rear diff (after changing the ring and pinion gear) and it works fine until you increase the HP of your car beyond the STi's.
The STi tranny works VERY well with the WRX, especially with a lighter flywheel.
You are right about the cost though, it's not cheap. But you will not have to worry about the weak WRX tranny anymore.
you CAN use the WRX axel shafts and the WRX rear diff (after changing the ring and pinion gear) and it works fine until you increase the HP of your car beyond the STi's.
The STi tranny works VERY well with the WRX, especially with a lighter flywheel.
You are right about the cost though, it's not cheap. But you will not have to worry about the weak WRX tranny anymore.
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Posts: 4,128
From: Driving the Green Beast
Car Info: Version 7.5 2002 STi
You may want to look at an RA gear set for your 5 speed too. I know people with this conversion and they're very happy with it. There's less shifting than with the 6 speed since the gearing is closer.
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Joined: Jul 2003
Posts: 136
From: MD
Car Info: 2003 WRX, blue
www.gruppe-s.com they are a vendor on i-club talk to Preston. They sell them as cheap as they get. I highly recommend them. Just don't try and by c-west stuff from them(don't ask)
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02, 2002, 390, aftermarket, conversion, cost, hard, rs, sti, subaru, swap, tranny, transmission, wrx, yahoo
