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Old 08-11-2014, 02:57 PM   #1
fyrrix
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Join Date: Feb 2012
Location: grand rapids, mi
Vehicle:
2005 WRX Wagon

Default 5th grinds and pops out. New trans? If so what one- 2005 wrx wagon 5mt.

I have searched for a while trying to find what transmissions will bolt up without changing a bunch of stuff. Considering a 6mt swap or a low mile 5mt.

HP/TQ goal is 300ish at the wheels with a 16g on e85 in the future. Currently stage 2 on cobb map.

What is the easiest/ cheapest to swap 6 speed year? It looks like 04 but I might be wrong?

What 5mt trans will drop in without any modification? Will they hold the power I want?

Thanks!
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Old 08-12-2014, 10:21 PM   #2
fyrrix
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Anyone? Is there a link to a trans compatibility area somewhere? I was able to find that it is either a bad synchro or the main shift nut that is the problem. Worth repairing or just swap it out?
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Old 08-12-2014, 10:59 PM   #3
VinceCarter
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Location: Connecticut
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2006 WRX 6 Speed
277/323 @ EFI Logics

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I believe all you need for a swap is an 06 or 07 STI transmission (to match your 3.545 rear diff ratio) with an automatic transmission drive shaft to accomplish the easiest/cheapest swap. And a DCCD controller.
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Old 08-13-2014, 12:44 AM   #4
fyrrix
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And my axles will work?
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Old 08-13-2014, 02:21 AM   #5
VinceCarter
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277/323 @ EFI Logics

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Quote:
Originally Posted by fyrrix View Post
And my axles will work?
Don't take my word for it but I think so. Just do some searching on 06/07 swaps into 04/05 WRX and I'm sure you'll get the answer in less than 10 minutes of Google.
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Old 08-19-2014, 05:04 PM   #6
fyrrix
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not finding a ton of info on this swap. Also, it seems my problem can be a loose or stripped main nut OR trans mounts?
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Old 08-19-2014, 05:12 PM   #7
Bikelok
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If you want a 6 speed, then do lots of research.

If you want easy, then get another 5 speed. A properly maintained 5 speed that's not beat on, but driven hard (there IS a difference), can handle up to 300hp (some people have had great luck up to 350hp). If you think you are not the greatest using a standard then go with the 6 speed.


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Old 08-19-2014, 05:58 PM   #8
fyrrix
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I'm not a bad driver and honestly would like to know more about the trans mount being a possible issue, IIRC there is a missing bolt or something on the trans mount which I didn't think was a big issue... but it has popped out and ground in 5th since I have owned it so I just stopped using 5th...

I have done a lot of research on the 6 speed but with all of the combos out there its hard to find someone with an 05 that swapped an X trans into their car that used the stock axles and rear diff (want to keep 5x100 and don't really need the brembo swap so I can maybe save 4-6K by not buying brembos, r180 rear diff, axles, hubs, new summer and winter wheels, etc....

From the research I have done it appears that an 06 or 07 trans will drop in without having to do anything else except maybe an AT driveshaft or modding my stock driveshaft, but there isnt a "6 speed swap compatibility" page or anything like that to my knowledge.... If there IS that would be awesome. A simple this diff will work with this DS, will work with these axles, etc would be super handy instead of just saying hey google it and every single person spending 200 hours researching stuff that should only take about 15 minutes with a proper compatibility write up.
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Old 08-20-2014, 03:05 PM   #9
fyrrix
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Old 08-20-2014, 03:12 PM   #10
BbugWag
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This is all the information you should need for a 6 speed swap. It is fairly straight forward actually.

http://forums.nasioc.com/forums/show....php?t=1772793
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Old 08-20-2014, 03:28 PM   #11
fyrrix
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AWESOME!!!!! I could not find that, its all I dreamed it would be.
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Old 08-20-2014, 03:33 PM   #12
fyrrix
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According to this an 06/07 STI trans will drop in without modification... from what I can tell at least.

Will I be able to upgrade to an STI clutch kit without doing anything else? Would I need an STI flywheel if I did? Doesn't seem like a good idea to use the smaller WRX clutch even if I got a new kit.
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Old 08-25-2014, 05:43 PM   #13
fyrrix
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Anyone have info in the clutch/flywheel deal?
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Old 10-03-2014, 05:20 PM   #14
fyrrix
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So I would really just like to figure out why its popping out of gear. From my research it doesn't look like the trans is bad....

I also forgot to mention that every great once in a while it sticks if I ride 1st to over 4k at 3/4 throttle or so.

I then have to keep the clutch in, wiggle it until it pops into neutral, let off the clutch and push the clutch back in, then it works perfectly fine as if nothing ever happened.

This has been happening since I bought it in April 2011.

I suspect loose main nut as the likely culprit? Any other ideas? Need to get my 5th gear back and stop this annoying 1st gear sticking problem.

I also can hear something bouncing around in the trans when it gets hot. No idea if thats actually the case but it kind of sounds that way... Would something make that noise if the main nut was loose?
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Old 10-04-2014, 11:43 PM   #15
fyrrix
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Anyone?
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Old 10-06-2014, 09:51 AM   #16
fyrrix
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Still need help with this. Please!
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Old 10-08-2014, 01:55 PM   #17
fyrrix
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2005 WRX Wagon

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Anyone? I have researched this issue from top to bottom and cannot find any solid facts. Just speculations or assumptions... I was able to find that the main nut issue is very common with the WRX 5MT transmissions and SOUNDS like it would cause most of if not all of my problems. If anyone with a solid amount of knowledge regarding the wrx trans I would be very greatful.
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Old 10-23-2014, 02:00 PM   #18
fyrrix
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Bump? Still trying to figure out if I can fix this trans? Someone also suggested the possibility of a the transfer case being the issue? Any opinions? Halp?
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Old 11-24-2014, 11:58 AM   #19
ace88bull
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I had an issue with mine popping out of 5th gear at highway speeds with the cruise on when the load went off the transmission. The input shaft nut had loosened because it had not been crimped. I don't know about the other issues, it's possible they're related. We had to remove the transfer case to get to it.
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