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Old 01-10-2015, 07:53 PM   #1
wtdash
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Default 2002 - 2005 WRX 4EAT JDM Upgrade

Goal:
I want the JDM Shifter w/the SportShift (SS) / Tiptronic option AND the JDM TCU / TCM.

It appears that the 'SportShift' is a function of the transmission, not just a shifter and TCU swap/upgrade. Maybe the old 'power mode' from the SVX and Gen1 and Gen2 Legacy are an option?

So...I'm SOL.....Info below for reference, but won't make a NON-SS trans into a SS-equipped trans.

EDIT 2-1-2015: Tried to ground the Connector B55 Terminal 23 PIN on the TCU to turn on POWER mode- didn't work.

EDIT 3-4-2015: I bought a 2002 JDM TCU thru an LC member that speaks (or his wife does) Japanese and got it from a Japanese auction site. Plugged it in and got code 95, which is NOT on the DTC code list on either my EDM FSM or USDM FSM....only goes up to 93.
- Pic of TCU HERE.
- P/N info:VG 31711AE920 / A64-000 RIG
- Will NOT install 'as is' due to different bracket design (LH vs RH drive??), may be able to just swap TCU covers and reuse USDM bracket.

EDIT 6-26-15: Bought a 2005 WRX / Saabaru 92x TCU (31711AJ510) from ebay and tried it for the heck of it. Car initially ran OK but after a few miles it seemed to get Torque Bind and shift into/out of Park>Drive w/a 'clunk'. So I took out that experiment.

Current Info:

2002 WRX Wagon w/4EAT Automatic Transmission.
Upgrades:
- 565cc Injectors
- STI fuel pump
- VF28 turbo
- STi TMIC
- 3" TBE
- Catless Up Pipe
- GS EBCS
- Tune

My trans was recently replaced w/one from a USDM WRX w/73K miles (car has 170K) - it's NOT a JDM replacement. It has the IPT-updgraded VB and TC. The US model came stock w/the VTD AWD transmission w/the 45 Front/55 Rear torque distribution.

AFAIK, the car runs as good as it gets w/the 4EAT - confirmed by the Subie Tech (and Tuner) that installed the trans for me. Compared to the same trans in his Saabura, he thinks it's great.....I'm not as impressed.

Technical stuff:

I've read the US-version of the SS isn't much - if any - of any upgrade on the Legacy models where it was originally installed.>>> Delayed shifts and no real performance improvement.

The VTD transmission seems to be a part of ALL the SS-equipped cars, BUT the SS is NOT a part of the 2002-2007 (?) US WRX VTD-equipped cars until 2008....so wondering if this is a different transmission or just missing the SS option for whatever reason??

TCU / TCM pinout IO info for WRX - US and EUDM, Aussie, Legacy, Forester (XT), and Baja (Turbo) is avl. attached to this POST.

I'm hoping the JDM version IS better as my 4EAT still sucks - even w/the upgrades.

Other options:
Looking for an '04 BAJA Turbo TCU/TCM w/the Sportshift. The Shifter looks similar to the WRX, except the SS shift gate is on the opposite side of the Baja's. The USDM Legacy (and subsequent Impreza and Forester) have the SS gate on the left.

Baja SS:


Found this POST on here showing a JDM 4EAT w/ "Tiptronic" (assume that's Sportshift).

WRX JDM 4EAT SS:


The Baja parts are RARE as SS was only avl. in the Baja Turbo version*........wondering if the '05-'06 are compatible, too.

Still checking to see if the connectors are the same on the Baja's TCU / TCM (WRX has 3 24-pin) as the Baja's.
Edit: They are NOT the same. :-(. The Baja has a 17, 24, and 31 pin connectors.

But my '02 is a very early WRX w/a build date of 1/2001.

UK?JDM Legacy 4EAT SportShift w/Power mode:


Pic of Legacy 2005 Sportshift.


This would be for the 5EAT, but it looks the same as the one used in the '08+ Impreza w/the 4EAT. I wonder if it would work as it's got a completely different shift pattern than the Baja's. Also, it appears SI Drive (Subaru Intelligent) became avl. in 2007. The SI Drive is probably what I really want as it modifies ECU-based parameters to increase the shifting's performance, but I'm sure that neither the '07+ ECU or TCU would work w/my '02.

Found this POST on NASIOC showing a JDM 4EAT w/ "Tiptronic" (assume that's Sportshift). The shifter looks identical to the Baja unit.

*I'm finding some conflicting info online about what Baja models had the SportShift. Was it ALL turbo models or only certain turbo models? Per cars101.com, it should be all, but it might depend on the model and year?

AT Transmission codes (not part numbers):

US '02 WRX TV1A4YN1AA

I don't know if these are interchangeable w/the US model or not!
JDM WRX TV1B4MB5AB-A3

JDM WRX TV1B4YB1AB-KT


FWIW, here are the TCU Part #'s I pulled from opposedforces.com. These are for '02-'06 WRX, BAJA, Forester XT - for turbo models only. I don't know where to find the JDM part numbers :

Quote:
WRX tcu part numbers:
31711AE941
31711AH230
31711AH530
31711AJ510

Baja
31711AJ000
31711AJ001
31711AJ300
31711AJ301 (??)

Forester XT
31711AH380
31711AH381
31711AJ370
31711AJ371
31711AJ470
31711AJ471

'07 XT Sports - 1st year of VDC/VTD in Forester: 31711AL900
'08 XT - 1st year of SportShift ?? - 30919AA870
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Last edited by wtdash; 07-25-2016 at 11:16 AM. Reason: VTD NOT VDT - doh!
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Old 02-12-2016, 02:42 PM   #2
llamsn
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I'm going to revive this thread for curiosity's sake...

Did you ever get the SS to work properly in your 4EAT WRX?
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Old 02-12-2016, 04:01 PM   #3
wtdash
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Default SS shifting

Hi
Nope. As noted above I think the SS is a different trans and not just a shifter/TCU upgrade. 😞

GL
TD
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Old 02-12-2016, 04:25 PM   #4
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To put in the JDM transmission you would need the full wiring harness of the jdm car +ecu+tcu etc.

And then you wouldn't be able to pass any OBDII inspections.
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Old 06-26-2016, 01:27 PM   #5
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a couple of years back i swapped my engine and tranny for the JDM 2005 Limited WRX EJ205 with AT tranny.
it has sport shift .
worked perfectly for a couple of month back then it got stuck on 3rd gear , i decided to replace it with a MT tranny.
right now i have the 4EAT tranny , TCU , rear differential and wiring harness ( but cut badly ) laying around.
the tranny could be easily repaired , its basically a solinoid inside that is stuck i guess.
i could sell them but im on the other side of the world...EGYPT.
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Old 11-05-2016, 05:24 PM   #6
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While looking for 4eat info trying to see which cars had 4eat phase 2 version 1 and which had phase 2 version 2, I came across some diagrams showing the difference in valvebodies. Some phase2 version 1 diagrams showed and extra (SPORT shift) solenoid that the non sportshift valvebody did not have, but looked like tgere is a spot for the missing solenoid.

Seems you MIGHT be able to add the SPORTshift solenoid to your valvebody then change trans internal harness w extra plug for solenoid and phase2ver1 ss tcu. Or use phase2 ver1 sportshift valvebody/harness and corresponding tcu. Plus of course ss shiftee. Idk if it will work w.o steering wheel buttons hooked up or gear indicator display not hooked up.

But it seems you should be able to convert phase2ver1 non sportshift to sportshiftusing correct phase2 versiin1 4eat sportshift parts. Def can not use phase2vrrs2 stuff unless car originally had phase2version2 4eat.

Google image 4eat phase ii version I and look for diagrams of valvebody. Most show where sportshift solenoid can go and empty space on non spirtshift valvebidy
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Old 11-18-2016, 11:00 AM   #7
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Ive never heard of the P2V1 4EATs having a way to engage a "sport shift" or "SS" mode. Thats very interesting. Could you please show us a picture with the area highlighted that youre talking about?

To the PO, have you found out any new information yet? Ive been dying to have the option to manually shift in my 02 WRX 4EAT. Also I should tell you that since youve had IPT do a lot of work to your 4EAT Phase 2 Version 1, there is NO SUPPORT our there for the Phase 2 Version 2 4EAT! No valve body kits or working over, no torque converters, etc.

I need the ability to manually shift through the gears in my WRX, I just do. I have a fake leg and cant use a clutch anymore and this is killing me. Please keep trying to make this happen! If I can help in any way let ke know! This needs to happen for the good of the community!
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Old 11-19-2016, 05:09 PM   #8
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Ill try to post some pictures of the phase2ver1 valvebody/solenoid I am talking about once I get to a computer or figure out how on my phone.

Looks like the only transmission difference is the extra solenoid wiring.

I've been looking for pinouts of the jdm wrx tcm and usdm legacy gt tcm to see if they are different than 02-05 us wrx tcm. I wouldn't be too surprised if our tcm aleady has sportshift, just not wired up. Empty pins on tcm. Just need to see jdm wrx tcm or legacy gt
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Old 11-22-2016, 02:16 PM   #9
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Quote:
Originally Posted by hadi10 View Post
a couple of years back i swapped my engine and tranny for the JDM 2005 Limited WRX EJ205 with AT tranny.
it has sport shift .
worked perfectly for a couple of month back then it got stuck on 3rd gear , i decided to replace it with a MT tranny.
right now i have the 4EAT tranny , TCU , rear differential and wiring harness ( but cut badly ) laying around.
the tranny could be easily repaired , its basically a solinoid inside that is stuck i guess.
i could sell them but im on the other side of the world...EGYPT.
It worked because you had the entire swap. It won't work with just 1 or 2 pieces.
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Old 11-27-2016, 09:30 PM   #10
phyregold
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Having the entire swap does help, glad most of it bolted up
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Old 11-27-2016, 10:48 PM   #11
4eat05
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Seems like the phase 2 version 2 4eat guys have it figured.

But after seeing a couple I/o pinouts of phase 2 version 1 4eat tcms with sportshift, I wouldn't be surprised if sll p2v1 tcms with 3 plugs are sportshift capable. but not 2 plug tcm.

Also. While adjusting my ebrake handle, I noticed a random fake looking sensor kind of hidden under carpet. Had 3 wires, black red tan, that looked like it was plugged into a fake sensor and came out of the same harness as the plug/harness for the non sportshift 4eat shifter. I want to find a power/hold button out of a leg/foz/impr that has sportshift and see if it plugs in and does anything...

I still need to get on a computer and post the diagrams of the valcebody showing the 1 extra sportshift solenoid and the tcm I/o pinouts I was talking about earlier. Or figure out how to fo it w my phone.

I really want to figure sportshift out for phase2ver1 4eat cars.

Last edited by 4eat05; 12-03-2016 at 02:32 PM.
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Old 11-28-2016, 11:42 PM   #12
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Do you have a pic of the wire/connector? Can't say i have ever seen that when removing my carpet and stuff.
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Old 11-29-2016, 04:28 PM   #13
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Quote:
Originally Posted by silvercookie View Post
Do you have a pic of the wire/connector? Can't say i have ever seen that when removing my carpet and stuff.
After more reading t seems its a g-sensor.
Maybe cars with the power/hold switch replaces that g sensor w the switch? Bot sure. Need to see more fsm.
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Old 11-30-2016, 03:45 PM   #14
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Quote:
Originally Posted by silvercookie View Post
To put in the JDM transmission you would need the full wiring harness of the jdm car +ecu+tcu etc.

And then you wouldn't be able to pass any OBDII inspections.
This is not true.

I was able to pull the transmission pan and swap over all the wiring on my forester with JDM 4EAT.

Be careful with final drive ratios. My "forester" 4EAT ended up coming out of a 2.0 Legacy with a FD of 4.111
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Old 11-30-2016, 03:52 PM   #15
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Quote:
Originally Posted by anjuna View Post
This is not true.

I was able to pull the transmission pan and swap over all the wiring on my forester with JDM 4EAT.

Be careful with final drive ratios. My "forester" 4EAT ended up coming out of a 2.0 Legacy with a FD of 4.111
Not if it is a sport shift 4eat.
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Old 11-30-2016, 04:51 PM   #16
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Looks like Shoopster on clubwrx has done it successfully on p2v1 using pretty much whole car to convert.

Withou whole trans you will need valvebody plus wiring or at minum adding extra solenoid to your valvebody and add wiring gor added solenoid.
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Old 12-03-2016, 02:23 PM   #17
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labeled as #9 but actually #8 in left diagram
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Old 12-03-2016, 02:25 PM   #18
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1998-2000 4eat phase 2 version 1 did not have provision for sport shift solenoid.
2001+ 4eat phase 2 version 1 did have open spot for sport shift solenoid even if not used.



List of which phase 2 4eat's are version 1 or version 2 and diagram of version 2 valve body to compare with other diagrams of version 1 valve body.
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Old 12-03-2016, 11:11 PM   #19
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Default 2002 - 2005 WRX 4EAT JDM Upgrade

why wouldnt you be able to pass OBD2 inspections? my jdm ecu communicates just fine with emission machines.
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Old 12-10-2016, 04:19 PM   #20
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Quote:
Originally Posted by Titter View Post
why wouldnt you be able to pass OBD2 inspections? my jdm ecu communicates just fine with emission machines.
Might be different in canada than usa?
Seems everyone in my state has to swap back to usdm ecu gor inspection bc jdm ecu wont communicate w state inspection computer.

If not for that, id be saving upfor jdm wrx ej205/4eat/ecu/tcu instead of trying to make jdm 4eat/tcu work with usdm ej205/ecu.

I really wish my 05 wrx had phase2 sportshift 4eat
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Old 05-08-2017, 03:05 PM   #21
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Bump

For several years I've wanted to add Sport Shift to my USDM 1998 Legacy GT Wagon NA EJ25D 4EAT. There is an abandoned thread on SL-i.net on the feasibility of doing this:
http://sl-i.net/FORUM/showthread.php...t-in-a-1999-GT

It's my wife's daily and she has a hard time with her left leg, so a 5MT swap isn't going to fly.

The factory original plain-Jane 4EAT in my USDM Legacy GT seems to have eaten it on Friday. No prior indications of any problem before except for the common 1-2 shift lurch at low speed. The car has had that hard shift for the many years we've driven it daily. Friday evening my wife called me as she was leaving her work to drive home when she told me that as she pulled away from a stop sign, she heard a loud pop or bang, and the car instantly wouldn't hardly move. She managed to get the car to an open parking lot and I drove out to meet her as she called for a tow. I poked around the engine compartment and had a look underneath the tranny but nothing looked unusual such as fluid leaks. The ATF dipstick looked fine, the Redline that I've been running for 3 or 4 years looks like new and the level was plenty high on markings. The engine runs great in neutral, but when rowing the gear selector through each gear with the brakes on, it was easy to hear grinding noise once a gear was engaged. I did not move the car, but when the flatbed arrived, the tow guy had no trouble moving the car in neutral with gravity and foot power in order to put it into position to load it on the truck.

I'm now investigating the possibility of a full Turbo Swap with Sport Shift into this nice old wagon, and the general consensus from the Legacy guys is that a USDM Turbo Baja with Sport Shift 4EAT Auto would be the most straightforward swap. It's also pretty rare, so finding a donor is going to be its own challenge.

I've owned this wagon for 6 years and I've done much of my own work, but I'm a complete turbo newb. Considering this, I'd also like to know if I can simply put in a Baja Sport Shift 4EAT transmission to replace the dead one for the time being to get the car back on the road (sticking with the factory NA 2.5 engine), and then deal with the Sport Shift features (and potential turbo swap) at a later time. My guess is that this would be plug and play, but I'm not sure... I may need to have the Sport Shift TCU and/or Sport Shift Gear Shift Selector Assembly installed and wired at the same time the Sport Shift 4EAT Auto gets installed. The USDM 2003-2004 Legacy GT 2.5 automatics also came with Sport Shift 4EAT.

I'd like to contribute to this thread, so here is some information that may be useful:

****

2003-2006 Subaru Baja Turbo and 2003-2004 Subaru Legacy GT Sport Shift 4EAT Automatic Transmission Codes:

TV1B4YCEAB Part Number: 31000AF030 Subaru Legacy GT 2.5L Subaru Baja 2.5L TURBO S/S 4WD T 2003
http://parts.subaru.com/p/AUTOMATIC-...1000AF030.html

TV1B4MHFAA Part Number: 31000AG060 Subaru Baja 2.5L TURBO S/S 4WD T 2004
http://parts.subaru.com/p/Subaru__/A...1000AG060.html

TV1B4YCFAB Part Number: 31000AF730 Subaru Legacy 2.5L S/S 4WD GT Sedan Wagon Limited Sedan 2004
http://parts.subaru.com/p/Subaru__/A...1000AF730.html

TV1B4YCFBB Part Number: 31000AF760 Subaru Legacy 2.5L S/S 4WD GT Sedan Wagon Limited Sedan 2004
http://parts.subaru.com/p/Subaru__/A...1000AF760.html

TV1B4MB5AB Part Number: 31000AF950 Subaru Legacy 2.5L TURBO S/S 4WD BAJA-B PICK UP 2005, 2006
http://parts.subaru.com/p/Subaru__/A...1000AF950.html

****

Now I have to hunt.

EDIT: Forgot to mention I've already got a JDM MOMO SportShift steering wheel with +/- gear select buttons. It's currently got no airbag and I'd have to sacrifice cruise control.

Last edited by camroncamera; 05-08-2017 at 03:11 PM.
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Old 05-08-2017, 04:33 PM   #22
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Quote:
I'd also like to know if I can simply put in a Baja Sport Shift 4EAT transmission to replace the dead one for the time being to get the car back on the road
TL;DR: No.

Longer: Your '98 is still Phase 1 everything - ECU, TCU, etc.

The 99 in the SLI post is the Phase "1.5"....Subaru Transition year, so no a good example (but I didn't read the complete Thread).

The Baja will install and connect -sort of (P2 bell housings have more bolt connectors), but it won't shift correctly if @ all.

You'd need to do the FULL swap as noted. And after having owned both an '04 FXT and '02 WRX w/the 4eat, turbo'd Subies w/the 4eat are not much fun.


You can use any '90-'98 Subaru 4EAT in your '98, but the '96-'98 GT, LSi, OB, SUS and '98 Forester and Impreza RS will have the same FD ratio - 4.44.

You try the "Power mode" on the '98? It helps 'liven' up the shifting a bit.
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Old 05-08-2017, 05:28 PM   #23
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Quote:
Originally Posted by wtdash View Post
TL;DR: No.

Longer: Your '98 is still Phase 1 everything - ECU, TCU, etc.

The 99 in the SLI post is the Phase "1.5"....Subaru Transition year, so no a good example (but I didn't read the complete Thread).

The Baja will install and connect -sort of (P2 bell housings have more bolt connectors), but it won't shift correctly if @ all.

You'd need to do the FULL swap as noted. And after having owned both an '04 FXT and '02 WRX w/the 4eat, turbo'd Subies w/the 4eat are not much fun.


You can use any '90-'98 Subaru 4EAT in your '98, but the '96-'98 GT, LSi, OB, SUS and '98 Forester and Impreza RS will have the same FD ratio - 4.44.

You try the "Power mode" on the '98? It helps 'liven' up the shifting a bit.
Thanks for the detailed reply. I'm going to keep investigating and figure out how seriously I want to take this project.

I remember that the following model year, Legacy GT '99, was a transition year, as you say. I forget if there's additional minor engine or sensor changes between '98 and '99 EJ25D, or if none occured until Gen 3 BE/BH. I believe that by USDM MY03-04 Legacy GT with Sport Shift 4EAT they had gone to SOHC. So now I worry that swapping the TCU and ECU but keeping the '98 EJ25D engine would not be a happy combination.

I can say with certainty that driving an NA 4EAT isn't all that inspiring either

I do have the Power Mode mod on a discrete aftermarket switch on the lower dash near the driver's right knee. It helps a little...
http://legacygt.com/forums/showthrea...69#post4830869

Last edited by camroncamera; 05-08-2017 at 06:10 PM.
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Old 05-08-2017, 08:14 PM   #24
camroncamera
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Quote:
Originally Posted by wtdash View Post
TL;DR: No.

Longer: Your '98 is still Phase 1 everything - ECU, TCU, etc.

The 99 in the SLI post is the Phase "1.5"....Subaru Transition year, so no a good example (but I didn't read the complete Thread).

The Baja will install and connect -sort of (P2 bell housings have more bolt connectors), but it won't shift correctly if @ all.

You'd need to do the FULL swap as noted. And after having owned both an '04 FXT and '02 WRX w/the 4eat, turbo'd Subies w/the 4eat are not much fun.


You can use any '90-'98 Subaru 4EAT in your '98, but the '96-'98 GT, LSi, OB, SUS and '98 Forester and Impreza RS will have the same FD ratio - 4.44.

You try the "Power mode" on the '98? It helps 'liven' up the shifting a bit.
Just to clarify... you are saying that a Phase 1 ECU (for Phase 1 USDM '97-'98 DOHC NA EJ25D) will NOT communicate with a Phase 2 TCU (for Phase 2/Version 1 USDM Sport Shift 4EAT), even if they could be connected together?
When you say FULL SWAP into my Legacy '98, you mean nothing short of Baja Turbo Longblock + ECU + TCU + Sport Shift Gear Selector Assembly + Harness merge, right?
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Old 05-08-2017, 11:43 PM   #25
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Quote:
Just to clarify... you are saying that a Phase 1 ECU (for Phase 1 USDM '97-'98 DOHC NA EJ25D) will NOT communicate with a Phase 2 TCU (for Phase 2/Version 1 USDM Sport Shift 4EAT), even if they could be connected together?
Correct - they don't know each other.

Quote:
When you say FULL SWAP into my Legacy '98, you mean nothing short of Baja Turbo Longblock + ECU + TCU + Sport Shift Gear Selector Assembly + Harness merge, right?
[email protected] least...may be even more to it. Read on all the other swaps online. There are actually quite a few '96-'98 Impreza/Legacy/Outback/Forester swaps online....they'd all be essentially the same. Long block would include the Baja's IM, engine harness, etc, too
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