6MT Master Swap Thread

[Scooby2.5]

Anyone know if we can our stock legacy rear axles with a sti rear axle to get the equivalent of the spec b rear axle?

 

Basically just transplanting the outer diff end part of sti rear axle on to the stock rear axle in case there was any confusion?

 

TIA,

Anthony

 

Answer is in one of the four main 6 speed swap threads ie NSFW, Hammer downs, Groff, or the stickied thread. Can find it searching.

 

If I remember correctly its not possible as someone already tried it and details are in the post.....

[ama0787]

Found some spec b axles for a good price but thanks anyway planning on putting 5th and 6th gear in a 201 sti 6 speed if you know where any info on that is let me know plan on doing the work myself

[KCwagon]

Found some spec b axles for a good price but thanks anyway planning on putting 5th and 6th gear in a 201 sti 6 speed if you know where any info on that is let me know plan on doing the work myself

 

Your doing this yourself ?

[kleinerbastler]

I found out, that the newer 6MT from 08 (or 09) up have no speed sensor anymore, so you will need the vsspro from dccdpro to get a speedsignal for older cars. Maybe it was written some posts before, i didn´t found that info - so i gave it now to you.

[LouzGT]

I found out, that the newer 6MT from 08 (or 09) up have no speed sensor anymore, so you will need the vsspro from dccdpro to get a speedsignal for older cars. Maybe it was written some posts before, i didn´t found that info - so i gave it now to you.

 

from doing my swap on my 08 LGT i dont need the vsspro because the speed sensor is based off the wheel speed now, not off the transmission anymore. I did a 05 sti swap in my car last week but im not sure on the 05-07 models.

[Scooby2.5]

05 and UP Legacy also uses speed sensor, it has been discussed in one of the 6 speed threads.

 

08 and up tranny is perfect for our cars. On the older ones you can pull the sensor and get the 08 and up 6 speed plug for the hole.

 

Part is listed in NSFW thread.

 

We need to get someone to sticky, Groff's, Hammer down, and NSFW 6 speed threads.

[Scooby2.5]

If you're selling your 6MT, may be interested.

 

Me too I'd rebuild it myself and save you the money if price was right

 

 

Well supposedly the repairs will cost around 1200. A new transmission can be had for 4000-5500.

 

If someone is really interested in this transmission Id sell it for the right price.

 

I could purchase a new one and sell this one as is.

 

Calvin Dotson at Cobb tuning in plano drove it and felt Andrewtech was correct on the diagnosis.

 

He even commented how it shifts like butter, in all gears, its just noisy in 6th and 5th a little bit.

 

Probably has 50K on it now.

 

Had Extra S put in it when we installed it last Nov 2011, changed it again Nov 2012.

 

I bought it from a guy on this forum in Canada who got it from Lachute Performance.

 

Drives me nuts on freeway at 70 MPH in 6th.

 

Problem is I drive my car every day for work so to pull it out, have it repaired and then put back together and in the car its hard for me because I dont have another car.

 

You would have to pay shipping though but I could ship it fairly cheap through my work.

 

Let me know if anyone is interested in doing this.

 

Or shoot me an offer via PM........

 

If either of you or anyone is interested in my 08 STI 6 speed let me know. I may be purchasing a rebuilt or new one in the next couple of months and quite possibly selling the one that is in my car now.

 

As far as I know it only needs the 5th and 6th gear cluster per Andrew-tech

 

Here is a video of the noise and I posted my original comments about this transmission above.

 

[ame=http://www.youtube.com/watch?v=RED5NrudhDE]08 STI 6 Speed Gear whine in 6th - YouTube[/ame]

 

PM me if any interest and/or a reasonable offer

Edited April 14, 2013 by Scooby2.5

[Scooby2.5]

If you're selling your 6MT, may be interested.

 

Me too I'd rebuild it myself and save you the money if price was right

 

 

Well supposedly the repairs will cost around 1200. A new transmission can be had for 4000-5500.

 

If someone is really interested in this transmission Id sell it for the right price.

 

I could purchase a new one and sell this one as is.

 

Calvin Dotson at Cobb tuning in plano drove it and felt Andrewtech was correct on the diagnosis.

 

He even commented how it shifts like butter, in all gears, its just noisy in 6th and 5th a little bit.

 

Probably has 50K on it now.

 

Had Extra S put in it when we installed it last Nov 2011, changed it again Nov 2012.

 

I bought it from a guy on this forum in Canada who got it from Lachute Performance.

 

Drives me nuts on freeway at 70 MPH in 6th.

 

Problem is I drive my car every day for work so to pull it out, have it repaired and then put back together and in the car its hard for me because I dont have another car.

 

You would have to pay shipping though but I could ship it fairly cheap through my work.

 

Let me know if anyone is interested in doing this.

 

Or shoot me an offer via PM........

 

If either of you or anyone is interested in my 08 STI 6 speed let me know. I may be purchasing a rebuilt or new one in the next couple of months and quite possibly selling the one that is in my car now.

 

As far as I know it only needs the 5th and 6th gear cluster per Andrew-tech

 

Here is a video of the noise and I posted my original comments about this transmission above.

 

[ame=http://www.youtube.com/watch?v=RED5NrudhDE]08 STI 6 Speed Gear whine in 6th - YouTube[/ame]

 

PM me if any interest and/or a reasonable offer

Edited April 14, 2013 by Scooby2.5

[Scooby2.5]

If you're selling your 6MT, may be interested.

 

Me too I'd rebuild it myself and save you the money if price was right

 

 

Well supposedly the repairs will cost around 1200. A new transmission can be had for 4000-5500.

 

If someone is really interested in this transmission Id sell it for the right price.

 

I could purchase a new one and sell this one as is.

 

Calvin Dotson at Cobb tuning in plano drove it and felt Andrewtech was correct on the diagnosis.

 

He even commented how it shifts like butter, in all gears, its just noisy in 6th and 5th a little bit.

 

Probably has 50K on it now.

 

Had Extra S put in it when we installed it last Nov 2011, changed it again Nov 2012.

 

I bought it from a guy on this forum in Canada who got it from Lachute Performance.

 

Drives me nuts on freeway at 70 MPH in 6th.

 

Problem is I drive my car every day for work so to pull it out, have it repaired and then put back together and in the car its hard for me because I dont have another car.

 

You would have to pay shipping though but I could ship it fairly cheap through my work.

 

Let me know if anyone is interested in doing this.

 

Or shoot me an offer via PM........

 

If either of you or anyone is interested in my 08 STI 6 speed let me know. I may be purchasing a rebuilt or new one in the next couple of months and quite possibly selling the one that is in my car now.

 

As far as I know it only needs the 5th and 6th gear cluster per Andrew-tech

 

Here is a video of the noise and I posted my original comments about this transmission above.

 

[ame=http://www.youtube.com/watch?v=RED5NrudhDE]08 STI 6 Speed Gear whine in 6th - YouTube[/ame]

 

PM me if any interest and/or a reasonable offer

Edited April 14, 2013 by Scooby2.5

[frank_ster]

^ because race car ..

 

i rode in a brand new 08 sti in 08 and it made that noise

[Scooby2.5]

I don't think it should only in 6th

[frank_ster]

long shot.. but have you tried a very heavy shift knob?

[Scooby2.5]

Heavy and light but not a real heavy one.

 

I have discussed this with pheonix legacy, andrewtech, rallitech, and cobb plano drove the car and the consensus is something is not OK in 5th/6th cluster

[crashdumbe]

So I bought a complete 04 sti for my swap....can I use those axles or do I need to get spec b axles? Thanks.

 

Anything else I should know??

 

 

 

 

 

I typically create threads like this after the stuff gets installed, but I'm making an exception in this case because I need a place to take notes while I sort through the information that is sprinkled throughout the "6mt master swap thread" (and others) so that the next person to undertake this swap won't have to go on an easter-egg hunt to learn what they need to know.

 

There are two main recipes for 6MT swaps. They key difference between them is the rear diff ratio. Both use 3.9:1 front differentials, but the later transmissions have a 1.1:1 ratio on the rear output shaft, which requires a 3.54:1 rear diff.

 

Recipe A - 3.90 rear diff

Transmission options: 04/05 STI*, or 08/09 Spec B

Rear diff options: 04/05 STI, possibly 07-09 Legacy GT R160**

Rear axles: 07-09 Spec B (axles 28421AG03B, axle seals 806732200)

Front axles: Regular LGT***

Driveshaft: use a Spec B driveshaft, and replace the differential's input flange with the R160 flange.

(The Spec B R180 has an R160 input yoke, but is only available in 3.54:1.)

 

Recipe B - 3.54:1 rear diff

Transmission options: 06+ STI (I don't know what the upper bound is, but unclemat used an 08)

Rear diff options: 02-05 WRX R160, 07-09 Spec B R180*****

Rear axles: Regular LGT with R160, Spec B axles with R180.

Front axles: Regular LGT

Driveshaft: Spec B****

 

Note that there are two versions of the Spec B 6MT transmission and they have different final drive ratios.

 

* Some 04 STI transmissions need minor changes for LGT front axles - click here for more info.

** I have conflicting information about which Legacy GT R160s have which ratios.

*** 04 6MT will need new axle seals to use LGT front axles. (Part numbers here)

**** Per Z0rro, an 05-09 4EAT driveshaft can substitute for a Spec B driveshaft.

***** Cars101.com says the 08/09 Spec B uses a 3.9 final drive, however that apparently includes the 1.1 reduction in the transmission.

 

Small parts: (needed for either recipe)

 

Please confirm these part numbers for your particular transmission.

Most of these are just what I used for my 05 STI 6MT swap; later years may have differences.

 

Keep your 5MT neutral sensor switch, put it in the 6MT.

6MT shift linkage (Preferably Spec B; the Impreza shift linkage is shorter) (Is this still true for 08+ Impreza?)

6MT clutch fork - 30530AA050

6MT clutch release shaft - 30532AA020

6MT clutch slave cylinder - 30620AA172 - alternate:30620AA173

6MT clutch hose

6MT throw-out bearing

6MT rear transmission mount (same part for Spec B and Impreza)

Reverse lockout cable - 35060AG010

Downpipe support bracket - 44021FE030

R180 diff mount from the spec B - 41310AT040 (not strictly necessary, but click here for some info)

Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 for 04-07, and 11021AA010 for 08+

Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210 - $11.50

Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060 - $5.20

Inner shift boot (foam/rubber, mostly for noise insulation, you can reuse the 5MT if you trim it)

If you get a DCCD diff, you'll need an aftermarket DCCD controller.

 

Courtesy of ShockerGT:

If you have an STI shift linkage, the shift lever will not be centered as the STI shifter rod and shifter stay are shorter than the Legacy parts. So, you'll need these:

 

Spec B Shifter Rod: 35041AG020

Spec B Shifter Stay: 35031AG020

 

Stick with 04-07 STI shift levers, as the 08+ versions are not compatible.

 

 

What you DON'T need:

 

Vehicle speed sensor - the LGT speed sensor is not on/in the transmission.

6MT rear transmission crossmember (same part for 5MT, just needs the 6MT mount (the rubber part))

 

Considerations: (which recipe is right for you?)

 

The Spec B 6MT has a 50/50 torque split, lacks DCCD and has an open front diff, but is less expensive

04/05 STI 6MT has a 35/65 torque split, open center diff, and DCCD

06+ STI 6MT has a 41/59 torque split, helical center diff, and DCCD

R180 rear diffs are stronger than R160 rear diffs.

The Spec B R180 uses an R160 input yoke. Not sure how much this affects strength.

Unclemat opines on differential technology.

And so does Homemade WRX.

 

Last but not least, the Spec B 6MT gear ratios are more evenly spaced than the USDM STI 6MT ratios, and they're a bit taller. Rallispec will install them into STI transmissions, and they call it a "high speed" gearing option. I did it mostly for the even spacing. Better mileage would be a nice side-effect if I stayed out of boost, but how likely is that?

 

 

Reference material:

 

Hammer Down's thread: http://legacygt.com/forums/showthread.php/sti-6-speed-swap-05-gt-61199.html?t=61199

sti_lusts's thread: http://legacygt.com/forums/showthread.php/6-speed-transmission-conversion-my-05-54771.html?t=54771

LegacyGT.com 6MT swap thread: http://legacygt.com/forums/showthread.php/6mt-master-swap-thread-107137.html

BDII's NES 6MT swap thread: http://www.newenglandsubarus.com/forums/showthread.php?t=13187

NASIOC.com 6MT swap thread: http://forums.nasioc.com/forums/showthread.php?t=1201152

An Impreza 6MT swap: http://forums.nasioc.com/forums/showthread.php?threadid=872902

A thread with some DccdPro info: http://forums.nasioc.com/forums/showthread.php?t=2032099

Info about differential types: http://forums.nasioc.com/forums/showthread.php?t=423584

Spec B shifter assembly: http://opposedforces.com/parts/legacy/us_b13/type_12/manipulation/manual_gear_shift_system/

 

Part sources:

 

Millenium Auto - http://www.y2kimports.com/ (Used Subaru parts, including 6MT transmissions)

Silverline Automotive - http://www.silverlineautomotive.com/ (6MT swap packages)

Thrash - http://www.thrashdriveshaft.com/ (custom driveshaft, $650ish)

Spiider - http://www.dccdpro.com/ (Aftermarket DCCD controller)

SGP - http://www.subarugenuineparts.com/ (Axles, seals, clutch fork, etc)

 

Instructional video:

[Scooby2.5]

^ You beat me to it.

 

You did a wonderful thing with that OP, why and the heck do people not read it.

 

Never ceases to amaze me!

[Waxiboy]

Parts list:

 

Trans: 08+ STi

Diff: 08+ STi (combo with trans)

Driveshaft: 05-09 2.5i wagon 4EAT

Rear Axle: 07+ Spec B

 

Tranny will come with trans support, OEM FW, slave cylinder, fork, return spring and shifter.

Diff comes with cradle.

 

Can I run this without DCCD for now and just add it later?

[frank_ster]

^ i would think it would default to open diff..

you could even just put a toggel switch for open and locked for time being also if you were concerened about getting stuck pulling a trailer in the mud with a bob cat on it ..

 

 

 

i hate it when that happens

[HAMMER DOWN]

IIRC you can on 07 & up DCCD is part mechanical. Unlike 04-06, with out a DCCD control, the DCCD is fully open. Not recommended to run with out a DCCD controller.

[frank_ster]

^ oh ? i think they all have oil pumps. and there is a solonoid that varries the pressure of the transfer clutch.

 

the center differential of a 6mt is remarkably similar to a 5 eat. and the 4 eat vdc version.

[HAMMER DOWN]

^^^ It have a oil pump to feed the moving parts like the oil pump in a engine. The DCCD is a electric magnet wet clutch diff. The more voltage you give it the less slip you have between the front & rear diff. The DCCD controller supplies min. voltage to the DCCD at all times. 05 STi MT, min. setting is 65\35 split to the rear, Max is 50/50. Fully open is only happens when you switch the power off.

 

Copy/ paste from my swap thread;

 

Here is more pics. of the ” Spiider’s” Auto DCCD controller install, wiring, switches install and I add my own "E" brake kill switch. which will open up the center diff. whenever I use the "E" brake. Just in case I feel like drifting the rear around in the winter.

 

OEM DCCD control switch used for good looks.

http://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909072127.jpghttp://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909072124.jpghttp://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909072126a.jpg

 

 

 

I put the pics. in order of connection from Power tap to ECU. Autozone as a 10a mini piggy back fuse set up. Just plug it in to the fuse port for the 12v accessory out let. Run wire to the DCCD controller that seat so nicely on top of the Air bag control unit. I used 3M 2 sided tape & a long zip tie. JB weld G sensor in place. Run TPS wire to ECU under passanger side floor panel.Why'll I was there. I hooked up a switch to my test wire connector. So I don't have to dig them out every time I use my APv2.

 

http://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071710_edited.jpghttp://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071708a.jpg http://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071712a.jpghttp://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071712.jpg

 

I found this roller mini switch at Radio Shack. It is prefect for what I needed to do. All it does is cut the ground circuit. When the "E" brake is used.

http://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071533.jpg http://i99.photobucket.com/albums/l293/HAMMERDOWNGT/Subaru/th_0909071532.jpg

 

 

 

Mike

Edited April 19, 2013 by HAMMER DOWN

[frank_ster]

oh so it is.. a magnet... cool..

 

well then it could be controled by a simple Potentiometer and on off switch and you could forever drive the car with out it connected.

[HAMMER DOWN]

I read that running the DCCD for extended time with out power (fully open) can damage the unit (very hard on the clutches). Can't remember if it was a fact or someone's opinion. I sure you'll figured it out. Edited April 19, 2013 by HAMMER DOWN

[frank_ster]

I read that running the DCCD for extended time with out power (fully open) can damage the unit (very hard on the clutches). Can't remember if it was a fact or someone's opinion. I sure you'll figured it out.

 

well i have not taken one apart. but i understand its function. and same as a5 eat the clutches probably fully release when at cruise speed . with the magnet engaged or released the diff spins as a unit like a front or rear differential. i would think the only thing damaging to it would be running different size tires or being towed with the rear wheels on the ground.

 

the only possible snag i could think if is the magnet could be of a higher voltage than 12 volts. but i would doubt it. its pretty much exactly the clutch mechanism on a lawnmower for the mowerdeck. you can reduce the voltage which reduces the clamping force.

 

hammer down do you know the size of fuse that feeds the dccd controller?

[ama0787]

Thought you might be interested flatiron selling new 07 tranny for 4200$

[Scooby2.5]

I have a new 08-12 lined up just need to sell mine. Looking for offers

My estimate was 450 in parts and about 400 labor to fix

If anyone interested in a good deal shoot me an offer