Do this:
- On the PIDs tab, uncheck Supported;
- File->Select Controller, and select A40 Allison 6 Speed TCM;
- File->Enter VIN, and enter the VIN;
- Info->Validate Pids, and let it complete;
you should now see a bunch of pids.
I'm getting a bunch of PID's now, but not the TCC slip one that I need.