Thought id just give an update on this. Got the hardware all sussed and have most of the shifting alogorithms sorted, based it on the way the Delco runs a 4L60E.
The problem i have at the moment is the the lockup clutch and the shift firmness. I have a switch for power/economy and want it to shift ealier and smoother in economy mode. The 4L60E uses a 32hz PWM signal to lock the TCC, about 50% duty is enough to lock it - anyone know the specs to lock the A34xE??? Iam also not sure about the line pressure solenoid and what frequency it requires.
Iam going on saturday to get the factory repair manual to take a closer look but the flick through i had the other week didnt tell me much about the electronics side of things.