Anybody Doing Anything With The LZ9 Engine?

[Will'sFiero]

from a control standpoint, it has the exact number and type of sensors as a 4T65.... i would say that if there are any control problems, they either aren't 4T80 specific or base calibrations aren't anywhere where they need to be.

IIRC, the logic of one of the shift solenoids is flipped in the 80 vs. the 60 series transmissions.
In the 4L80E, both shift solenoids off defaults to 2nd gear while the same in the 4L60&65E defaults to 3rd gear. I think the transverse transmissions are the same.