HungryPillow

Yo madrig, I finally received the hood scoop and installed it today! The fitment really is perfect and the install super easy, thanks for the wonderful quality piece... now I want more!

 

So you just plugged in the '08 TCU and all was good?

 

Canbus messages should be the same other than the throttle bliping stuff.

 

I'm not too sure about the TCU stuff, I just dropped my car off at the shop with my friend and asked them to do the transmission swap. I think they mentioned they kept my rear diff and torque converter though.

 

I forgot to take pics of the swap so only got this one when everything was down

 

What I recall it was the different TCU that would not work with the ECU of the car.

 

Oops, I forgot to give an update.

 

I actually went ahead with the swap from a 08 LGT (the tranny was rebuilt) into my 06 and it worked perfectly. Did not have to change or modify anything, it was a direct fit. Been using it for the past few months and it is so much better than my stock one. Hope this helps someone if they ever attempt to go through with it, thanks for all the advice here!

Awesome, I will try to get it done like the diagram... thanks for the help!

We did the wiring following the AEM instructions, so I'm pretty sure he did not go through the FPCM.

 

I saw him use a multimeter to figure out which wire sends the signal to prime the fuel pump when the ignition is switched to On and starts running the fuel pump when the car starts. I believe he tapped into that wire.

 

Sorry, when I said ECU I think I meant the factory fuel pump relay, which I think gets its signal from the ECU?

 

Is the FPCM located on the passenger side inside of the car above where the rear seats are? My car is RHD if that matters.

 

I just spent some time looking over Underdog's modified diagram, I think I understand it now and will ask my mechanic to follow that and to also check the ground.

 

When he says to beef up the FP+ and FP- wires, does that mean you just solder the ends of the 12GA wire onto the existing wire?

 

Thanks for your help.

Hi guys,

 

I know I'm a few years late to this thread but I'm at my wits end so hoping I can get lucky and find someone who can help figure out what's wrong.

 

I've got a '06 LGT with a VF53 turbo, Process West TMIC, ID 1050x injectors, and some other supporting mods. Recently my friend noticed my car was running lean and knocking right when boost starts to come in, so I decided to upgrade my fuel pump and wiring. I went with the AEM 340LPH fuel pump and their 20 amp relay wiring kit.

 

Everything was installed and running fine (or so I thought). My knocking/lean issue went away, but I noticed that every time I get on the throttle, when the duty cycle of the fuel pump goes from 66% to 100%, I will hear the relay click very rapidly 4 or 5 times. It does not click anymore if I keep accelerating all the way to redline, but will click again the next time I hit 100% duty cycle on the fuel pump. I thought maybe the clicking was normal, but after a few days my car threw a CEL code P0230 - Fuel pump primary circuit. This happened 2 times after resetting the code... the car didn't die and still drove normally, but I drove it gently after the code came on.

 

The way my mechanic wired the relay was terminal 30 to the battery, terminal 87 to the fuel pump, terminal 85 to the fuel pump switch line from the ECU, and terminal 86 to ground. I'm not in the US and my mechanic has never done a relay kit like this before and I know next to nothing about wiring.

 

Does anyone have any idea what could be causing the clicking sound from the relay and the P0230 CEL code? I would really appreciate any help, thanks!

As far as I know, Doc Crowley had a USDM 2006 legacy GT with a dead 5EAT and tried to put a 2005 USDM legacy GT 5EAT into it. Same model of car, just one year different. I do not know about engine code, transmission code and whether they matched up.

 

I also don't know what you got in Singapore, so I can't say for sure. What I'm saying is that from the 2005 Legacy GT in the US to the 2006 Legacy GT (same car on the outside, some everything, more or less), Subaru made internal/ECU/TCU changes so that you could not just swap parts from one year to the other.

 

I wish you the best of luck - and I mean that. I'm just trying to answer your initial question with as much detail as I have.

 

Thanks, I really appreciate the help and links to Doc's post. Now I'm really having second thoughts on even attempting this swap...

 

Can the TCU be swapped over too or is it not that simple? I'll try to find out what year the donor car is and just pray it's the same as mine

Read this first: http://legacygt.com/forums/showpost.php?p=5333533&postcount=1177

 

HexMods is considered THE guru for the 5EAT. Now, in this case, it was putting an '06 5EAT into an '05 car, IIRC. You're going the other way. However, his comment of "it will be a hybrid of the two" probably still applies. EVEN if the part numbers are the same, I would think. Unless it's really a late '05 and you have an early '06? I guess it depends on how much work you can do yourself - if you can swap over JUST the gears or something, then it's probably fine. If you're paying someone else, you don't want to end up paying them to do the research..

 

Thanks for the links, it seems like like they were trying to swap transmissions from different chassis and models?

 

For me I checked the plaque in the engine bay on both cars, it is the same chassis, same revision, same engine code, same trim code, and same transmission type.

 

I'm in Singapore and the 2.5 LGT was only officially offered here with the 5EAT, I'm just hoping the TCU will be OK with a transmission from possibly different years.

I was going to say, at a minumum, you would need an 05/06. I know its different from an 08/09.

 

Who the hell knows what an 07 runs.

 

lol, I checked with the donor car and our transmission part numbers listed on the plaque match so I think it should be good to go.

As far as I know, if you want to do a straight swap, it needs to be the same year.

 

OK, that's what I was afraid of... thanks

Checking in with the experts here before I go down this path... if I have a 2006 GT 2.5 (BL9) with a 5EAT, does this mean I can swap my transmission with any other BL9 regardless of their production year? Or do I have to specifically look for one that was made in the same year? I guess my main concern is the TCU differences between the two transmissions.

 

The only reason I'm considering this is because I get a very loud 2nd to 3rd gear clunk when the car is still cold. I've tried a full ATF flush and ATF additive but the clunk is slowly getting worse. I have access to a donor car and the cost would be much less than rebuilding my current gearbox.

Love this build, looking really great!

They come up in the marketplace for sale here semi frequently. Welcome, have a look around.

 

http://legacygt.com/forums/forumdisplay.php/member-classifieds-2005-2009-30.html?f=30

 

Thank you! Seems like I can't search that forum yet nor click the attached photos (I assume this is cause my post count is still low), but I will manually take a look around.

I somehow stumbled into this thread just in time since all my bushings are pretty worn, so thanks for all the great info! I will most likely place an order for the front LCAs, just curious if anyone has found anything similar for the rears? Tried searching all over Rock Auto and eBay but couldn't find anything.