OOH! Found a low mileage cheap transmisison! Now help me...

[ciper]

I need help with the wiring. My service manuals are with Nate so I cant look them up myself.

Id like to put the TCU pinout from the first gen legacy next to the 2003 WRX TCU.

I tried searching on Nasioc for WRX TCU pinouts (and many varients) but turned up little. Can you guys help?

I already realize that using a Legacy TCU will provide 75front 25 rear when it thinks 90-10 and 25front 65rear when it thinks 50-50 lock. The only downside is my car will act more like a RWD

[Yukonart]

The only downside is my car will act more like a RWD

Guess that really depends on what you plan to do with the car. . . . autocross with a RW-biased drivetrain, anyone?

[vrg3]

If you'd like copies of the 2002 WRX transmission and wiring factory service manuals, PM me a way for me to get the electronic versions to you. Hopefully the information you need is buried in them.

What is the mechanism by which the Legacy TCU will provide 75/25 when it thinks it's 90/10?

[ciper]

VTD.

The signalling is the same, except its more like a standard differential thats electronically variable.

100% duty cycle
Ours 100% FWD
WRX 70%front 30rear

0% Duty cycle
Ours 50-50 lock
WRX 65 rear 35 front

[vrg3]

Ah... I see. That's some combination of the design of the WRX transmission's transfer case and the 1:1.1 center differential ratio?