Welcome to the North American Subaru Impreza Owners Club Wednesday February 21, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 03-14-2017, 01:09 PM   #1
cKgelo01
Scooby Newbie
 
Member#: 457932
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: Lincolnwood, IL
Vehicle:
2015 WRX Premium
Crystal Pearl White

Default 2016 STI Complete Drivetrain swap into 2015 WRX Help

Hello everyone, as the tittle says i need help, i have a 2015 WRX Premium 6spd MT and i purchased a 2016 STI 6MT complete drivetrain for cheap over a guy in fb. He Inlcluded The Transmission, Drive shafts, Rear Diff, all the cables and bushings, starter, all 4 hubs and axles, dccd controller (which is the center console of the sti), 16 STI cluster and cables and relays.

Now onto my question, knowing everything will bolt up just fine, it is the dccd controller that i am worried about, how will i wire it and to work inconjunction with the cluster.

Any helpful inputs will be great. Thanks
* Registered users of the site do not see these ads.
cKgelo01 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-14-2017, 01:19 PM   #2
seroki
Scooby Newbie
 
Member#: 395675
Join Date: Jul 2014
Chapter/Region: MWSOC
Location: Cincinnati, OH
Vehicle:
17 WRX WRB
16 WRX (RIP)

Default

Just a heads up, this is going to be a rather large undertaking and really shouldn't be attempted by a beginner without help from a trained mechanic. I also think this should be in the Transmission/Driveline forum. A mod will probably move this to that forum.

Aside from that, I don't have any experience doing something like this, so good luck on it.
seroki is offline   Reply With Quote
Old 03-14-2017, 04:01 PM   #3
GlarryHoodDIT
Scooby Specialist
 
Member#: 460907
Join Date: Jan 2017
Chapter/Region: RMIC
Location: Colorado
Vehicle:
2016 WRX
Phatron Tuned

Default

Im fairly certain the STi trans doesnt just bolt into the 15+ without any fab or anything, but Im not sure how many people have tried it.

Good luck.
GlarryHoodDIT is offline   Reply With Quote
Old 03-14-2017, 04:35 PM   #4
thatdamnalex
Scooby Newbie
 
Member#: 441196
Join Date: Feb 2016
Location: so cal
Vehicle:
2016 sti
DGM

Default

how are you sure everything will bolt up just fine?

I'm asking for educational purposes, but would you need an ECU from an sti for the sti diff? would you be able to run a sti ecu on the FA engine? you get info on what your center diff is doing from your dash, so would you need one of those?

I'm very interested in how this thread is going to go.
thatdamnalex is offline   Reply With Quote
Old 03-14-2017, 05:38 PM   #5
FaastLegacy
Scooby Guru
 
Member#: 11671
Join Date: Oct 2001
Chapter/Region: SWIC
Location: Gilbert, AZ
Default

Quote:
Originally Posted by thatdamnalex View Post
how are you sure everything will bolt up just fine?

I'm asking for educational purposes, but would you need an ECU from an sti for the sti diff? would you be able to run a sti ecu on the FA engine? you get info on what your center diff is doing from your dash, so would you need one of those?

I'm very interested in how this thread is going to go.
He says he got the cluster too, but I would imagine you're right, there's going to be ECU issues having to do with the diffs.
FaastLegacy is offline   Reply With Quote
Old 03-14-2017, 06:05 PM   #6
Jack
Add Lightness
Moderator
 
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
not my president
(From General)

Default

The one thing I would be concerned with is if the WRX engine will bolt up to an STi (EJ) transmission. I don't know the answer and have not found it yet.
Jack is offline   Reply With Quote
Old 03-14-2017, 06:59 PM   #7
Schoat333
Scooby Newbie
 
Member#: 452248
Join Date: Aug 2016
Chapter/Region: MWSOC
Location: Cleveland Ohio
Vehicle:
2017 Base WRX
WRB

Default

There is a thread in the proven power section where a guy swapped a 6spd sti trans into a WRX. Unfortunately there are few details.

Here is the thread. (Post 26)

https://forums.nasioc.com/forums/sho...2708781&page=2
Schoat333 is online now   Reply With Quote
Old 03-14-2017, 07:09 PM   #8
Chuckable
Scooby Newbie
 
Member#: 447566
Join Date: May 2016
Location: South Florida
Vehicle:
2017 WRX
White

Default 2016 STI Complete Drivetrain swap into 2015 WRX Help

Yes it will bolt up to the FA block from what I've read and the center diff will just go to a default setup without a DCCD controller.

PM fredrik94087. He's done the swap and is knowledgeable.
Chuckable is offline   Reply With Quote
Old 03-14-2017, 09:25 PM   #9
hijinks
Scooby Newbie
 
Member#: 440839
Join Date: Feb 2016
Chapter/Region: RMIC
Location: Colorado
Vehicle:
2003 WRX
WRB

Default

You can always buy something like this as a workaround for the Dccd -
https://www.dccdpro.com/product/dccd...al-controller/

I will be using it in my jdm 6 speed swap
hijinks is offline   Reply With Quote
Old 03-15-2017, 02:18 PM   #10
SoapBox
Scooby Guru
 
Member#: 204578
Join Date: Mar 2009
Chapter/Region: MAIC
Location: Boston
Vehicle:
S54 E46, N54 E82,
N55 E84, AKA REX8

Default

Quote:
Originally Posted by seroki View Post
Just a heads up, this is going to be a rather large undertaking and really shouldn't be attempted by a beginner without help from a trained mechanic.
No, it's actually pretty straight forward. Certainly don't have to be a "trained mechanic" to pull the trans and diff out of a Subaru.
SoapBox is offline   Reply With Quote
Old 03-15-2017, 07:06 PM   #11
cKgelo01
Scooby Newbie
 
Member#: 457932
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: Lincolnwood, IL
Vehicle:
2015 WRX Premium
Crystal Pearl White

Default

Thanks for all the input, yes i have read that forum before and yes i have my buddy who has far more experience with this along with the local subaru community that i have asked.

Yes it will bolt up just fine and will be on a default config without a dccd control. I am aware that there is another aftermarket controller in the market at dccdpro.com

My main concerns is, what is the default ratio without the dccd control being hooked up? Is it 50/50?

Also what are the chances that i can make the stock sti dccd control to work with my setup (i have all the stock sti relays for the dccd and cluster).

And if i were to use the dccdpro thing would it work in conjunction with the sti controller knobs (i dont like wiring clutters in my car)
cKgelo01 is offline   Reply With Quote
Old 03-15-2017, 07:08 PM   #12
cKgelo01
Scooby Newbie
 
Member#: 457932
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: Lincolnwood, IL
Vehicle:
2015 WRX Premium
Crystal Pearl White

Default

Quote:
Originally Posted by SoapBox View Post
No, it's actually pretty straight forward. Certainly don't have to be a "trained mechanic" to pull the trans and diff out of a Subaru.
He is right, i am a medical staff. And not licensed to work on cars. But also a mechanic inclined diy guy. Follow me on ig b3ast_wrx
cKgelo01 is offline   Reply With Quote
Old 03-15-2017, 07:10 PM   #13
cKgelo01
Scooby Newbie
 
Member#: 457932
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: Lincolnwood, IL
Vehicle:
2015 WRX Premium
Crystal Pearl White

Default

Quote:
Originally Posted by Chuckable View Post
Yes it will bolt up to the FA block from what I've read and the center diff will just go to a default setup without a DCCD controller.

PM fredrik94087. He's done the swap and is knowledgeable.
Thank you, what is the default setup? Is it 50/50? Auto or manual dccd default?
cKgelo01 is offline   Reply With Quote
Old 03-15-2017, 07:12 PM   #14
cKgelo01
Scooby Newbie
 
Member#: 457932
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: Lincolnwood, IL
Vehicle:
2015 WRX Premium
Crystal Pearl White

Default

Quote:
Originally Posted by thatdamnalex View Post
how are you sure everything will bolt up just fine?

I'm asking for educational purposes, but would you need an ECU from an sti for the sti diff? would you be able to run a sti ecu on the FA engine? you get info on what your center diff is doing from your dash, so would you need one of those?

I'm very interested in how this thread is going to go.

Dont need an ecu for it, just to get the dccd mainly to work. Other than that you can leave it as is for a default ratio. Also my main concer is to get the oem sti controller to work in conjunction with the cluster in my system
cKgelo01 is offline   Reply With Quote
Old 03-16-2017, 05:19 AM   #15
SoapBox
Scooby Guru
 
Member#: 204578
Join Date: Mar 2009
Chapter/Region: MAIC
Location: Boston
Vehicle:
S54 E46, N54 E82,
N55 E84, AKA REX8

Default

Quote:
Originally Posted by GlarryHoodDIT View Post
Im fairly certain the STi trans doesnt just bolt into the 15+ without any fab or anything, but Im not sure how many people have tried it.

Good luck.
Humor us, how/why were you "fairly certain"?
SoapBox is offline   Reply With Quote
Old 03-20-2017, 03:44 PM   #16
nealric
Scooby Newbie
 
Member#: 450518
Join Date: Jul 2016
Location: Houston
Vehicle:
2016 STI
Arrest Me Red

Default

Not what you want to hear, but you really should just sell the setup, sell the WRX, and buy a STI. It will almost certainly end up costing less and that way you know it will work.

If you really want to use the STI drivetrain, I'd recommend building a factory five 818 with it.
nealric is offline   Reply With Quote
Old 03-20-2017, 04:50 PM   #17
SoapBox
Scooby Guru
 
Member#: 204578
Join Date: Mar 2009
Chapter/Region: MAIC
Location: Boston
Vehicle:
S54 E46, N54 E82,
N55 E84, AKA REX8

Default

Quote:
Originally Posted by nealric View Post
It will almost certainly end up costing less .
?

No it won't.

It all bolts in. There's no significant added cost beyond the hardway which he already bought cheap.
SoapBox is offline   Reply With Quote
Old 03-20-2017, 04:56 PM   #18
nealric
Scooby Newbie
 
Member#: 450518
Join Date: Jul 2016
Location: Houston
Vehicle:
2016 STI
Arrest Me Red

Default

Quote:
Originally Posted by SoapBox View Post
?

No it won't.

It all bolts in. There's no significant added cost beyond the hardway which he already bought cheap.
Odds and ends have a way of adding up when embarking on major projects like this. I recently did a major brake system swap on a car of mine (whole hydraulic system other than calipers replaced). Odds and ends ended up costing as much as the major hard parts.

And I mean cost as opposed to selling the setup and buying a new car- it's worth a few grand- which is likely the cost to swap cars. Not to mention the swapped the car will not have an STI vin, which means it won't be worth any more than regular WRX post-swap. Buying an STI means it's have more resale- meaning you will recover some of the cost of the upgrade down the line. Most buyers will be turned off by the full swap, as the buyer likely has no idea whether the person who did the swap was competent or a total hack job.
nealric is offline   Reply With Quote
Old 03-21-2017, 02:32 AM   #19
PULMEOVR
Scooby Newbie
 
Member#: 222724
Join Date: Sep 2009
Chapter/Region: E. Canada
Location: Ottawa, Ontario
Vehicle:
2017 WRX Sport
World Rally Blue

Default

Am I the only one thinking the guy should just sell the WRX and buy an STI?

Wouldn't that be way easier and factory built to boot, without costing much more at all?

Surely I'm missing something?
PULMEOVR is offline   Reply With Quote
Old 03-21-2017, 10:40 AM   #20
mishapopa
Scooby Specialist
 
Member#: 393629
Join Date: Jun 2014
Chapter/Region: W. Canada
Location: Calgary
Vehicle:
'15 WRX
'01 S2000

Default

It's doable and it's been done and SHOULD bolt on directly. Don't know why people are telling you to just buy an STI because you've already got the expensive part; the hardware. The rest is work and minor parts like fluids, gaskets, and bolts. And honestly it's not that difficult but you're going to be pulling out everything. The electrical portion will not function properly though and if you want it to, then yeah, buy an STI.

However the tranny in the WRX is pretty nice so I'd probably buy a used older WRX with a blown engine and do an engine and transmission swap while keeping the 2015 as a reliable daily. But that's just me.
mishapopa is offline   Reply With Quote
Old 03-21-2017, 04:15 PM   #21
nealric
Scooby Newbie
 
Member#: 450518
Join Date: Jul 2016
Location: Houston
Vehicle:
2016 STI
Arrest Me Red

Default

Quote:
Originally Posted by mishapopa View Post
It's doable and it's been done and SHOULD bolt on directly. Don't know why people are telling you to just buy an STI because you've already got the expensive part; the hardware. The rest is work and minor parts like fluids, gaskets, and bolts. And honestly it's not that difficult but you're going to be pulling out everything. The electrical portion will not function properly though and if you want it to, then yeah, buy an STI.

However the tranny in the WRX is pretty nice so I'd probably buy a used older WRX with a blown engine and do an engine and transmission swap while keeping the 2015 as a reliable daily. But that's just me.
Serious question, have you ever done a major build and tracked every single related expense? The big parts may be bought, but fluids, gaskets, replacement hardware, tools (if you don't already have a fully-equipped shop), can really add up.

Everything SHOULD bold on directly, but never underestimate the potential for minor things to make the swap more complicated. Things like missing or differently placed brackets can become a huge headache. That's not even getting into potential software headaches.

If you are or work at a shop that does custom work on Subarus day-in-day out, this could make perfect sense. If you have to ask about it on an internet forum, you are probably not someone who should undertake this job. It's one thing if we were talking about well worn 10 or 20 year old cars and are trying to resurrect a chassis with a blown motor. It's totally different when you are talking about an almost brand-new car.
nealric is offline   Reply With Quote
Old 03-21-2017, 04:57 PM   #22
mishapopa
Scooby Specialist
 
Member#: 393629
Join Date: Jun 2014
Chapter/Region: W. Canada
Location: Calgary
Vehicle:
'15 WRX
'01 S2000

Default

Quote:
Originally Posted by nealric View Post
Serious question, have you ever done a major build and tracked every single related expense? The big parts may be bought, but fluids, gaskets, replacement hardware, tools (if you don't already have a fully-equipped shop), can really add up.

Everything SHOULD bold on directly, but never underestimate the potential for minor things to make the swap more complicated. Things like missing or differently placed brackets can become a huge headache. That's not even getting into potential software headaches.

If you are or work at a shop that does custom work on Subarus day-in-day out, this could make perfect sense. If you have to ask about it on an internet forum, you are probably not someone who should undertake this job. It's one thing if we were talking about well worn 10 or 20 year old cars and are trying to resurrect a chassis with a blown motor. It's totally different when you are talking about an almost brand-new car.
I know if I had $10,000 worth of drivetrain lying around I'd put it to good use. The cost of all those other things is practically negligible.

This is not a major build, this is pulling a few components putting different components in. The headaches, if any can be solved with a drill, taps, and a welder.

OP doesn't seem concerned about doing the work as much as he is concerned about getting the electronics to work; and I'm not sure what he needs to do about this either, but it's a manual gearbox, who cares.

In case you missed a portion of my comment, I did suggest he get a WRX with a blown motor and just play with that rather than a brand new vehicle. That's what I'd personally do.
mishapopa is offline   Reply With Quote
Old 03-21-2017, 05:16 PM   #23
Loyale93
Newbie Moderator
Moderator
 
Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Ord, Nebraska
Vehicle:
'13 XV Crosstrek,12
1050 Triumph Speed Triple

Default

Quote:
Originally Posted by PULMEOVR View Post
Am I the only one thinking the guy should just sell the WRX and buy an STI?

Wouldn't that be way easier and factory built to boot, without costing much more at all?

Surely I'm missing something?
No, you're not. And usually is the way to go, especially for a swap within the same generation. It's like the people that did WRX and STI swaps back on the GD or GR chassis. Why? They sell that. Just go buy one. Unless you're getting the drivetrain on the insanely cheap, it's just not worth your time. Nobody values time. Not to mention any warranty.

If the question was "2016 STI Complete Drivetrain swap into 2001 RS Help!", I'm all for it.
Loyale93 is offline   Reply With Quote
Old 03-21-2017, 05:32 PM   #24
rtv900
Scooby Specialist
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

Quote:
Originally Posted by nealric View Post
Serious question, have you ever done a major build and tracked every single related expense? The big parts may be bought, but fluids, gaskets, replacement hardware, tools (if you don't already have a fully-equipped shop), can really add up.

Everything SHOULD bold on directly, but never underestimate the potential for minor things to make the swap more complicated. Things like missing or differently placed brackets can become a huge headache. That's not even getting into potential software headaches.

If you are or work at a shop that does custom work on Subarus day-in-day out, this could make perfect sense. If you have to ask about it on an internet forum, you are probably not someone who should undertake this job. It's one thing if we were talking about well worn 10 or 20 year old cars and are trying to resurrect a chassis with a blown motor. It's totally different when you are talking about an almost brand-new car.
^this guy is absolutely right.
When I built my hot rod I learned this painfully. No joke I spent a solid $15 grand on 'big part' items, and probably $10 grand on knick knacks that I couldn't even remember today. Just fasteners ALONE was probably $1500.
It never, EVER ends having to run for fittings, brackets, hoses, gaskets. . ..you get the wrong ones, can't return them, then get all three types they have in stock because you want to make SURE you got the right one, then one works. . .you decide to 'modify' another and never get around to returning the last one.
Multiply that by 387 different trips and you've spent thousands on odds and ends.
And just like he pointed out, it's one thing if you work in a dedicated Subaru shop or something and have 20,000 parts at your fingertips. But few of us have that, so you run for every last thing.

And the "it will just bolt up" rhetoric????
My lord I won't even start on that. Talk about famous last words.

Don't get me wrong, great project, but deluding one self into thinking it's going to be a 'bolt on' is how projects get abandoned 1/3rd of the way through and die.
rtv900 is offline   Reply With Quote
Old 03-21-2017, 05:41 PM   #25
Chuckable
Scooby Newbie
 
Member#: 447566
Join Date: May 2016
Location: South Florida
Vehicle:
2017 WRX
White

Default

I've had a few low-level projects than can nickel and dime you to death, so agree with all those who posted above. Also, there is a lot of wisdom in starting over with an STI to begin with.

But, maybe OP really likes his WRX? Maybe OP got a really amazing deal on the parts? Maybe OP can afford to do the project a piece at a time?

From what I've read this is very close to a true bolt-in. The shifter linkage is different, and you need an aftermarket DCCD if you want the center diff to be adjustable, but the transmission bolts in and everything hooks up. There is a post from somewhere (maybe already linked in this post?) which explains how even the front driveshafts are interchangeable.
Chuckable is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 11:33 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.