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Old 11-16-2008, 11:03 PM   #1
earlvb
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1997 Impreza OBS
Acadia Green 64C

Default Phase 1 4EAT with 02 ECU?

Hello, I'm thinking about swapping an engine from an 02 WRX into my 97 OBS with the phase 1 4EAT. Will the new ECU work with the older TCU and trans, or will I get error codes etc. It looks like the 02 ECU has an additional input (AT load signal) for the A/T that the 97 doesn't. Can the new ECU do without this input? What has to be done to make the two work together? Thanks for any help.
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Old 11-17-2008, 02:09 PM   #2
a6n6d6y
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possibly if you can get the signal wires setup properly....but it most definitely is not a plug and play deal

I think your best bet would be a full conversion, not just the motor
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Old 11-17-2008, 04:44 PM   #3
ciper
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I played with this idea for a while. It seems like the "best" way to do it was to make the car think it's using a manual transmission and then take whatever signals are needed for the TCU Effectively splitting the two to work separately (other than the VSS signal).
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Old 11-20-2008, 01:27 AM   #4
earlvb
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So no one's done this? Any other ideas?
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Old 12-04-2008, 06:30 PM   #5
earlvb
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Anyone else?
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