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Thread: DIY: 4EAT phase 1 power mode wiring

  1. #31
    SLi Resident Matty2Hotty's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    It DOES work on the phase 2 tranny, it's pin 20 on the white plug. Can someone please find a pinout of the TCU to figure out where this pin located is on the plug for other members!
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    "FNG" still_alive's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    It's a great mod! I would do it again in a heartbeat, took me ten minutes. I went to the local junkyard and cut that top plug off with about 8 inches of wire after it, I de-pinned it and now have 20 extra pins so I can do anyone's in my area. It's simple you just take the back of the pug off and push your pin in until it clicks. I hooked up a small toggle switch to it under the dash so I'm the only one that can use it easy, any questions I'd be glad to answer
    '98 Legacy Wagon

  3. #33
    t3h ub3r m3mber harrymaneuvers's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    I would love to know what to do for a Phase 2 4eat too!!!!!


    I will do it same day I get an answer!
    Harry Maneuvers
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  4. #34
    SLi Resident Matty2Hotty's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Pin20 on the white plug which i have no idea what pin it is. RS owners said it worked great but that was 3 year old forum, phase 2 have grey and white plug. Yet to get anyone with a pinout so can't say.
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  5. #35
    SLi Lurker bulldozer24's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    pin 20 is between the blue/white and the white/red wires on the white connector.
    99 Legacy SUS

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    t3h ub3r m3mber harrymaneuvers's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Oh snap... so who is gonna be the test monkey for a phase 2?
    Harry Maneuvers
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    Re: DIY: 4EAT phase 1 power mode wiring

    I did this about two weeks ago on my phase 2 and i can definitely tell a difference. It holds gears longer and shifts down sooner, everyone should do this too their 4eat.
    99 Legacy SUS

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    t3h ub3r m3mber harrymaneuvers's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Is the process any different for the Phase 2 owners?

    If it is, which pins need to be used?

    DETAILS PLEASE!!!!! DOING THIS ASAP!


    This should work on my ladies 04 WRX wagon with the 4eat too right?
    Harry Maneuvers
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  9. #39
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    Re: DIY: 4EAT phase 1 power mode wiring

    Quote Originally Posted by harrymaneuvers
    Is the process any different for the Phase 2 owners?

    If it is, which pins need to be used?

    DETAILS PLEASE!!!!! DOING THIS ASAP!


    This should work on my ladies 04 WRX wagon with the 4eat too right?
    its the same process, just ground out pin 20 which is between the blue/white and the white/red wires on the white connector, you can put a switch in line if you want to. And that's it, your done!

    As for the ladies wrx i have absolutely no idea.
    99 Legacy SUS

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    Re: DIY: 4EAT phase 1 power mode wiring

    How hard would it be to wiring the switch to an unused illumination spot in the cluster... when I was changing my perfectly fine fuel light bulb, I noticed that there are about 6 spots that arent used. I think there is a TCS, hill hold and a few other lights.
    Harry Maneuvers
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    Re: DIY: 4EAT phase 1 power mode wiring

    I have a BH Legacy (3rd version, MY99, EUDM) with 2.5L engine and 4 speed AT with Power mode and Hold (snow) mode. Is this mod going to affect my configuration? Or the Power button does the same thing?

  12. #42
    SLi nOOb TireIron's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    You already have the power mode, so that is exactly what this mod does. We got screwed in the US and didn't get any of the fun features or body mods.
    mine:
    '98 Legacy 2.5 GT Limited 5MT white sedan
    '96 SVX LSi 4EAT green

    for parts: '97 Legacy 2.5 GT 5MT white sedan

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    Re: DIY: 4EAT phase 1 power mode wiring

    i just did this on my 96 leggy and my shifts are smoother and my acceleration is better.

    so overall it was a good 10 minutes spent . im going to look at my girls 98 forester and see if i can do it to hers as well

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    Re: DIY: 4EAT phase 1 power mode wiring

    Added another picture for the phase 1 wiring. Still nothing on the phase 2, I don't have access to one.
    mine:
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    '96 SVX LSi 4EAT green

    for parts: '97 Legacy 2.5 GT 5MT white sedan

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    "FNG" 7cjbill2's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    I'd give it a try on my '99, anyone got a connector terminal + pigtail? U-pull-its are a thing of the past around here.
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    Re: DIY: 4EAT phase 1 power mode wiring

    I'm reading this closely, I have an Outback H6 and the auto blows. If I can search this out this weekend I'll report back. Really looking forward to a Phase II photo.

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    New User 1997lgt's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    just done this on my GT, it feels similar to pushing the Tow/Haul button in my Avalanche. But it makes it a LOT better. Highly recommended. Took approx 15 minutes.

  18. #48
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    Re: DIY: 4EAT phase 1 power mode wiring

    I wonder how this would be on my SS. even though it has the manual mode, I never use it since I baby the thing.
    UNNAMED '97 GT Wagon just picked up. Build thread soon.

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    t3h ub3r m3mber harrymaneuvers's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Im working up the courage to do this to my leggy... I think I will do it this weekend... maybe.

    Also found this on Wiki... makes me think that it would work in the 04 wrx:

    "4EAT
    This transmission was released in 1988 for use in the Subaru XT6 and Leone Touring Wagon. The bellhousing and input shaft were changed for the Subaru EJ engine, but this transmission is still in use today with only minor changes.
    Gear Ratios: 1st 2.785 2nd 1.545 3rd 1.000 4th 0.697 Rev 2.272
    Usage: 1988-1991 Subaru XT, 1990-2004 Subaru Legacy, 1992-1997 Subaru Alcyone SVX, and all Subarus 1995–Present
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    Re: DIY: 4EAT phase 1 power mode wiring

    They're referring to the physical transmission. I'm sure the TCU programming has changed quite a bit since 1988.

    Doesn't mean it won't work. What would be useful is info on more modern JDM/EDM transmissions and if they're still building this feature in.
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    Re: DIY: 4EAT phase 1 power mode wiring

    I don't know if the TCU was moved into the ECU or not for the newer electronics... If not it is a possibility although I know for a fact some of the newer ones like the outback have a "sport" mode that the shifter can be switched sideways into which does the exact same thing as "power" mode and makes the cars drive wonderfully.
    mine:
    '98 Legacy 2.5 GT Limited 5MT white sedan
    '96 SVX LSi 4EAT green

    for parts: '97 Legacy 2.5 GT 5MT white sedan

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    t3h ub3r m3mber harrymaneuvers's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Just went outside and looked... this is what I see on my Phase 2 plug... Am I correct to say that the wire that I am to tap into a ground is the empty space between the blue/white and the red/white wires on the white plug?


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    Re: DIY: 4EAT phase 1 power mode wiring

    yes thats it, i have already done it. The trans does feel different with shifts and how long it holds gears but that is just by feel, it may just be a placebo affect.
    99 Legacy SUS

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    "FNG" 7cjbill2's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    Anyone got any extra terminals/pigtails? I don't like the idea of just jamming a wire up in there.
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    Re: DIY: 4EAT phase 1 power mode wiring

    You dont need an actual terminal... I just went to Fry's Electronics and picked up a pack of these...



    Worked perfectly!!!

    First impressions:

    Completely noticeable... Not so much in first gear... but 2nd and 3rd definitely hold longer. A good example would be taking a right at an intersection about about 15 miles per hour. Before, the car would almost always be in like 2nd or 3rd... so after the corner, getting on the car would result in a down shift to get up to about 2500 RPM... now the car is already in that gear and accelerates without downshifting.


    Power Mode in the Phase 2 4EAT for the win!!!
    Harry Maneuvers
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    Re: DIY: 4EAT phase 1 power mode wiring

    Wow! read this post, spent ten minutes under the dash, ten minutes on the road and im back to say this has been by far the best thing i have learned for my car. Best $2 in materials ever spent on a car! I dont feel like i have to "shift" my car any more.

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    "FNG" 7cjbill2's Avatar
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    Re: DIY: 4EAT phase 1 power mode wiring

    I'll have to check for those KK terminals at Radio Shack, no Fry's around here.
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    Re: DIY: 4EAT phase 1 power mode wiring

    Would this mod do anything for my HARD 1-2 shift at low speed on my '98 BK LGT Wagon? Taking it slow and easy through a parking lot is anything but when the 4EAT jerks my head back during this shift. Normal acceleration on the street is not as bad.

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    Re: DIY: 4EAT phase 1 power mode wiring

    Quote Originally Posted by camroncamera
    Would this mod do anything for my HARD 1-2 shift at low speed on my '98 BK LGT Wagon? Taking it slow and easy through a parking lot is anything but when the 4EAT jerks my head back during this shift. Normal acceleration on the street is not as bad.
    Possibly, but that could be due to something else. Have you had your transmission serviced? (new fluids, etc) Try that first.

    Huffer, and quite a few others recommend Lubeguard ATF additive for transmissions that are having issues.
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    Re: DIY: 4EAT phase 1 power mode wiring

    The 4EAT is indeed due for transmission fluid replacement, I was hoping to change to Redline ATF last year after I did the head gaskets but it still needs to be serviced. Fortunately the AT was regularly serviced before we got the car last year. Thanks for the suggestion of Lubeguard Additive, I'll look into that. I've heard that the 1-2 lurch on the 4EAT is pretty common and am hoping for a regular maintenance solution.

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