Join Date: Apr 2002
Location: Chicago, IL
Model: The 'L' train
Feedback Score: 36 reviews
I guess you're not going to quit asking until I lay it out for you.
Yes you CAN put a DA auto into a DC. Sure, it will bolt to the engine.
The mounts wont fit, so I suppose you *could* have custom mounts fabricated to accommodate.
The DA you're talking about is OBD0, therefore you would need to swap the entire wiring harness and electronics from the DA into the DC so that the ecu could properly talk to that generation's auto transmission controller. After that is all said and done you'll realize that all of the other electronics in the DC that are dependent on the ECU wont work, because the OBD0 ecu doesnt talk to them correctly.
Alternatively, you *could* put in an auto trans from a 92-93 DA which is OBD1. You'd still need to make the wiring work and get the auto transmission controller as well (they are different). Again, the mounts wont fit correctly and you'll have to custom fab some up. You may need the ecu from the 92-93 of the same model (LS/GS/RS)
Or, you *could* go drive a properly functioning auto trans in a G3 and see if it shifts like the older generation did.
There, you *could* but it would be so cost/labor intensive that it would be a pointless exercise in futility.