Tried my IM508 and my MaxiSys Elite, verifying no issue with the transmission wire harness and connectors, Was unable to view live transmission data with either tool,(though live engine data worked.
I decided to try an old Snap On MT2500 Brick and was able to access live transmission data ok, so I figure it is an Autel software issue on both my Autel tools for this old GM Saturn S series model.