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Old 11-15-2011, 12:41 AM   #476
hlau09
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anyone have boosting issues after performing this swap i have a 04 wrx with a v9 6speed i used to get 15 psi now im barely getting 12 is this a boosting issue and my cobb tuner isnt reading the right gears say im in 2nd the tuner says im in 1st any suggestions?
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Old 11-15-2011, 08:35 AM   #477
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04' WRX's do not have per gear boost compensations as far as I knew... but maybe cobb added it.
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Old 01-04-2012, 09:03 PM   #478
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Doing an 06 6 speed into an 07 Wrx. Have an 04 r160.

1) I've read any auto drive shaft will do. Then I read only later year (02+) Forster or impreza auto drive lines. Then I read I need the flange on the r180 if using the r160/ auto drive line.
I was hoping to pick up a local 99 auto legacy drive line. Will this work, no modification?
And which of the above is true?

2) its been years since I dealt with a clutch. I know I need an Sti clutch and pressure plate, what about the flywheel?

3) I think not, but would the five speed linkage/ shifter bolt up, or is the reverse lockout mechanism built into the tranny, and therefore necessary?
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Old 01-04-2012, 09:53 PM   #479
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1) I think any auto driveshift from an ej series will work, as far as the flanges go, if you use an STI Driveshaft with an r160, you need the r180 yoke flange to get it to mate up. I dont think it matters with the r160/auto though, I think the holes still match up.

2) clutch/pp/flywheel has to match, ie if you opt to stick with a 5pd, it needs to be a 5spd everything or 6spd everything

3) 5 spd linkage will not work, need to use the 6 spd linkage, otherwise you wont be able to go into reverse etc. The 5spd shift lever is completely different and has no capability to attach it and the joint where the ball end of the shift lever pops into is also different on the 5spd, so you couldnt put a 6spd lever into the 5spd linkage. Im pretty sure it wouldnt fit as well due to differences in length/shape of the tranny's.
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Old 01-05-2012, 08:14 AM   #480
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^What frost said above is all correct, but I thought I would expand on it a little for clarification:

1) Any driveshaft from a 4EAT transmission should work. The rear yoke size should correspond to the rear diff it was used with, so if the driveshaft came off of a car with an R160, then you will need to mate it to another R160 rear yoke. If you're using an STI driveshaft you will need an R180 rear yoke.

2) You can use either a 5 speed or 6 speed clutch/flywheel/pressure plate, but they have to the PULL style clutchs (ie: not from 06+ WRX)

3) The 6MT linkage is required, no easy way around that.
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Old 01-10-2012, 03:09 AM   #481
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Quick question. I have a 02 Wrx. I'm putting a 06 STI trans in. I know I need the axle stubs from the 04 STI to reuse my front axles. From my research I've seen that I need specific oil seals for the stubs to properly work with the 06 trans. I've seen different part numbers for these seals. Just wondering who has done this specific swap and knows exactly which seals to use. Thanks.

Also, I can reuse my crossmember but I need the actual 6 speed tranny mount ? Is this correct?
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Old 01-15-2012, 06:48 PM   #482
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Argh! I bolted up a 2005 6MT into my 2005 WRX and the clutch isn't working properly. I'm using a 5MT ACT Extreme Street Clutch kit, the 5MT slave cylinder and the 6MT clutch fork and it's not disengaging all the way. Anyone have an idea what's going on?
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Old 01-15-2012, 07:41 PM   #483
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Quote:
Originally Posted by coyote_94yj
Argh! I bolted up a 2005 6MT into my 2005 WRX and the clutch isn't working properly. I'm using a 5MT ACT Extreme Street Clutch kit, the 5MT slave cylinder and the 6MT clutch fork and it's not disengaging all the way. Anyone have an idea what's going on?
It's possible that you may have to bleed the slave cylinder if air got into the hydraulic system. Is the pedal returning from the floor after you push it down?
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Old 01-15-2012, 10:09 PM   #484
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Quote:
Originally Posted by 02RexWI View Post
It's possible that you may have to bleed the slave cylinder if air got into the hydraulic system. Is the pedal returning from the floor after you push it down?
Err, I misspoke earlier, been a long day. The slave cylinder is not allowing the clutch to engage all the way. The slave cylinder doesn't go back far enough to completely engage the clutch. It isn't disengaging all the way either. I may make a shorter rod for the slave cylinder to allow it to engage all the way and try bleeding the system really good and see what happens though I don't know how air could have gotten into the system since it was never disconnected. Maybe the plunger traveled out too far when it was unbolted allowing a bit of air in. Dunno.
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Old 01-16-2012, 12:52 AM   #485
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The piston in the slave cylinder should collapse all the way and there should be no tension on the rod when the clutch pedal is up. Make sure that your clutch pedal is not pressed down at all, and the slave cylinder should push in enough for the rod to have slack...
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Old 01-16-2012, 01:21 AM   #486
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Quote:
Originally Posted by 02RexWI View Post
The piston in the slave cylinder should collapse all the way and there should be no tension on the rod when the clutch pedal is up. Make sure that your clutch pedal is not pressed down at all, and the slave cylinder should push in enough for the rod to have slack...
Right. It is collapsing all the way. The shift fork needs to travel another half inch before there is no tension. The pedal is all the way up.

Something isn't right with the setup somehow. Either the shift fork I have is wrong or I need a different slave cylinder because in order to release all the tension on the clutch, the fork needs to be touching the boot on the slave cylinder. That doesn't seem right that it would need to be that far forwards.

I'm going to try and find some pictures of a 6MT shift fork and compare them to the one I have.
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Old 01-16-2012, 08:11 AM   #487
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If you can take a video of the problem you're having it may be easier for me to help...
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Old 01-16-2012, 09:29 AM   #488
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Silly question... are you using a 5mt flywheel, or a 6mt flywheel?
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Old 01-16-2012, 12:55 PM   #489
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Quote:
Originally Posted by 02RexWI View Post
If you can take a video of the problem you're having it may be easier for me to help...
I'll try and find something to take a video with this morning and post it up. I really don't like the ACT clutch I'm running. I'm thinking of getting a different brand. We'll see.
Quote:
Originally Posted by NitroTrike View Post
Silly question... are you using a 5mt flywheel, or a 6mt flywheel?
5MT flywheel. The only 6MT parts I'm using right now is the transmission, clutch fork, rear diff, rear axle shafts, and rear hubs/brakes. The rest is all 5MT.
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Old 01-16-2012, 03:13 PM   #490
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Here's a short video demonstrating my problem. Lemme know what you think.

www.youtube.com/watch?v=zKiHdSTgvBM
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Old 01-17-2012, 11:28 AM   #491
NitroTrike
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Damn I swear I've seen this same problem before. I think they were trying to use a 6mt pressure plate on a 5mt flywheel, or some hooky combination like that. Are you 100% sure it's a 5mt clutch and PP?
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Old 01-17-2012, 12:15 PM   #492
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Yeah, that release fork seems like it is way too far back... make sure the release fork and clutch are correct.
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Old 01-17-2012, 12:16 PM   #493
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Not 100% sure. The clutch is an ACT extreme street kit and the flywheel is a 12lb F1 flywheel. Both the clutch and flywheel were installed about 6 months ago long before I started the swap and it worked then with the 5MT. I'll have to do some digging in my paperwork to see if I ordered or was sent the wrong parts.
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Old 01-17-2012, 12:18 PM   #494
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Quote:
Originally Posted by 02RexWI
Yeah, that release fork seems like it is way too far back... make sure the release fork and clutch are correct.
I don't know what a 6MT fork looks like but the one I'm using now is definitely different from the 5MT one that was in the car in the beginning.
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Old 01-17-2012, 10:06 PM   #495
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The receipts I have for the clutch kit and flywheel say they are for a WRX 2.0L so that means they are 5MT parts.
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Old 01-18-2012, 08:13 AM   #496
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When your video starts the release fork is way back by the slave cylinder, and it looks like it is tight there, and as you pull it a few times it gets further and further away at rest... can you explain this?
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Old 01-18-2012, 10:26 AM   #497
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Quote:
Originally Posted by 02RexWI
When your video starts the release fork is way back by the slave cylinder, and it looks like it is tight there, and as you pull it a few times it gets further and further away at rest... can you explain this?
Do you mean after I put the rod back in and got in the car? I was wedging a long prybar between the seat and the clutch pedal to hold it to the floor and it kept slipping. It wasn't slipping completely off the seat so the pedal wasn't fully released. I'll double check that tonight though. Workin 12s this week.
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Old 01-18-2012, 12:12 PM   #498
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Quote:
Originally Posted by petiey33 View Post
Quick question. I have a 02 Wrx. I'm putting a 06 STI trans in. I know I need the axle stubs from the 04 STI to reuse my front axles. From my research I've seen that I need specific oil seals for the stubs to properly work with the 06 trans. I've seen different part numbers for these seals. Just wondering who has done this specific swap and knows exactly which seals to use. Thanks.

Also, I can reuse my crossmember but I need the actual 6 speed tranny mount ? Is this correct?

Yeah, the stubs and all have the parts numbers listed at the bottom of the first post in the thread.

I'm trying to figure out the cross-member issue too. I don't have one, but it looks like the one in the parts diagram is quite different (longer?)

Can anyone that's done this in an 02 chime in?
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Old 01-18-2012, 01:05 PM   #499
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I've done many swaps. You can re-use your 5MT crossmember and transmission mount.
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Old 03-02-2012, 10:17 PM   #500
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I picked up an auto 98 legacy driveshaft. Too long. I picked up a 96 Impreza auto driveshaft. Too short.

Can someone please advise EXACTLY what year auto driveshaft they have successfuly installed in this swap?
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