antslegggy wrote:ooooff, thats steep, guess ill keep an eye out for em when im at the scrapper.
did i read that a 93 na tcu would work as well.
?same 4eats right?
As noted, the TCU's are different. You may get weird shifting issues w/the NA TCU on a turbo trans and vice versa.
Turbo 4EAT is different than NA 4EAT See this POST:
In order to handle the increased torque produced by the turbocharged engine, the 4EAT Transmission uses a larger Torque Converter. For additional strength, the input shaft has also been shotpeened. In both the Forward Clutch assembly and the High Clutch assembly, the number of drive and driven plates has been increased by one (1), while the retaining plate thickness has been reduced. The Low/Reverse Brake assembly has increased the number of plates by two (2), but the thickness has been reduced. The outer diameter of the Servo piston (band application) assembly has been increased in order to provide more band clamping force. Of course, the servo piston seals have also been enlarged to match the servo piston diameter. Due to the new piston shape the number of "O" ring seals has been reduced by one (1) Lubrication passages have been added to the Planetary Carrier assembly for increased gear durability. Finally the logic in the Transmission Control Unit (TCU) has <missing the rest>
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
I don't think the differences are big enough to cause shifting issues. They are for improved reliability. Its not exactly the same but I ran a 98 outback transmission with 4.44 final drive off of a 91 legacy TCU.
I did this today, and it's quite enjoyable, and only took a few minutes of actual work. The rest was finding a place that sold something to de-pin the connector.
And this video helped quite a bit with the method to use to pull the pin correctly.
I have a spare TCU sitting in my shed if anyone is still looking, not sure what year it came out of though, is there any way to tell?
2004 Impreza 2.5RS Fränkenpreza Daily Driver 1993 Legacy Sport: Sedan Sex Panther-R.I.P. @ the boneyard 1991 Legacy L Wagon: Sex Panther II 2005 Outback XT Turbo grocery-getter Wife's Daily Driver
ciper wrote:Why not connect the manual mode switch to both the manual mode input on the TCU and the power mode input?
Meaning when the manual mode button was pressed you'd be in both power and manual.
When the shifter is in D manual mode would have no effect but power would be working. I assume that in 2 the car would stay in second and in three the car would stay (mostly) in third.
Does power or manual mode have any effect when the gear selector is in 1?
Has anyone ever tried this? Seems this would work great.
I don't know if anyone has tried the above, but I wouldn't recommend it because the "manual" mode is not what it sounds like. It is a primitive version of traction control and keeps the transmission from going into 1st gear. It may alter the shift points and AWD mapping slightly, but not enough to really be beneficial.
I would just recommend doing the Power mode if you really want to do anything. I never really used the manual button to "aid" in traction, so it's kind of useless unless you're very gingerly with the throttle.
Most people do think the manual button "holds" the gear longer, which is incorrect. Like I said, I'd just recommend doing the power mode if you want to do the mod.
ciper wrote:Why not connect the manual mode switch to both the manual mode input on the TCU and the power mode input?
Meaning when the manual mode button was pressed you'd be in both power and manual.
When the shifter is in D manual mode would have no effect but power would be working. I assume that in 2 the car would stay in second and in three the car would stay (mostly) in third.
Does power or manual mode have any effect when the gear selector is in 1?
Has anyone ever tried this? Seems this would work great.
The problem with this, is that the manual mode switch has a different voltage running to it than you need for the power mode switch and it makes things act all funky. Someone has tried it, in this thread I think. But the thread is so long and so old that I'm not looking back through for the post, lol.
93 Touring Wagon (EJ20G 5spd Swap) -- Finally back and running strong as ever!
05 Outback 2.5XT 5spd -- Now the wife can have her SUV and get in on the turbo Legacy goodness at the same time.
FWIW, I can hold gears manually as long as I need to with 'power mode' engaged. I haven't tried to taking the engine all the way to redline, admittedly.
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
johndrivesabox wrote: Rally, my kyboard is brok, his has nohing o do wih h liquor.
dillonr92 wrote:So move said pin to empty slot and run a ground wire from the moved pin to the chassis?
Correct?
IIRC, you ADD a wire to the unused Pin 4 slot of 20 Pin TCU connector and ground it. If you move Pin 6 to Pin 4 the MANUAL button no longer works - but that might be OK, since it's rarely used...Plus you don't have to find another wire.
