Regarding the ALDL short-circuit.... Don't know which contacts off the top of my head to jump, but out of the multiple choice of contacts you cross 2 and it doesn't do anything but lock the torque convertor after 2nd gear resulting less slippage thus allowing the monster torque of the motor to do it's job.
I know the diagram is on
http://www.gnttype.org/ The GN and TTA share the same ECM except for the (factory) chip.