TCU's interchangable ?

[tiworld]

i have a 91 AWD turbo the TCU part No # 31711 AB373 A64-000-RRO can i use any other TCU from any other model

[ciper]

You can swap TCU between other years, do you have a specific one in mind?

[tiworld]

a new tcu is $1000 cnd for my year if i can find one in a breakers what can i use the subaru dealers said that part No is only for that year

[vrg3]

The part numbers are different for 90-91, 92, and 93-94... They're also different between FWD and AWD, NA and turbo, and LHD and RHD.

That doesn't necessarily mean you couldn't use a different part number -- Ciper would know -- but it would mean that part interchange databases wouldn't show them as interchangeable.

The weird thing is that 31711AB373, according to the info I have, is the part number for the TCU on a 1992 Legacy Turbo, not a 1991 like yours. I don't know what that means (my info is wrong, your car's got the wrong TCU, they're the same anyway, etc) though.

At the very least, I'm sure you have to get a TCU from an AWD car, since FWD ones won't know to drive the multiplate transfer clutch.

[ciper]

Well, Ive used a 90 91 and 92 TCU on a 90 91 legacy auto and 95 impreza auto.

The only important differences I see are only fwd/4wd and if the manual button exists (also power/manual lights)

[tiworld]

the vin No call it a 05 /91 is it a 91 the tranny shop said its a 92 ? hows that work is there any way i can check the TCu with out getting a new one ?