Hi KB,
I looked on www.holdencrazy.com the TCM files have OS id number starting with 2.
I looked inside the 2xxxxxxx files, they all seemed to be either 4L60/70E or 6L80/90.
The visible 4L80E calibrations are identical to the 4L60E.
Differences between 4L80E and 4L60E from TCM perspective:
- truck 4L80E/4L60E unlocks TCC on closed throttle decel whereas car 4L60E keeps it locked;
- 4L80E has single solenoid TCC whereas 4L60E has dual solenoid TCC;
- 4L80E has slightly different shift solenoid sequence than 4L60E.
If you have same OS id's then you can segment swap...
With the LS1 PCM this is easy as car 4L60E and truck 4L60E/4L80E both used OS 12212156.
With TCM this is not so easy (as you have found).
4L60E segment can drive a 4L80E transmission with the addition of 1 relay (shift solenoid) and repinning of two wires (TCC).
Are you looking at a swap...?