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I've got the 8HP now. Bought a Yanhua ACDP tool to make a backup of the TCU contents; supposedly it's also able to reset the transmission ISN.
Next step is to hook the transmission up to the car and see if it communicates. Other than power and PT-CAN bus, it has LIN bus to the shifter; and from the CAS, 15WUP wake-up signal, shift lock, and PA bus (which also goes to the steering lock).
It'd be nice if there were some convenient way to tap into the CAS connector, but I think I might just splice some wires and leave them loose for now while I still have the original transmission in the car.
Once everything is hooked up, plan is to figure out what module coding is required to get the CAS talking to the EGS. Hopefully it won't involve changing the VO to an E70...
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