More info from John at TunerCat, many thanks to him and he said it's ok to pass this along.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Auto Transmission Type:
Cal...

I'm not quite sure what it does. I saw an 08 corvette cal that said 5L40e and the trans was a 6L80e.

I just finished a car that had an 2014 LS3 engine and ecm but an '08 15 pin 4L60e and t42. ...

I'm not sure it matters as I have seen stock cals that don't match but I always like to match everything up to help the CAN since in most swaps we don't have a BCM as well as other things. Special...