Total Newb here... I rebuilt the 5.3 in my 2011 Tahoe. .20 over, Vinci cam, Yella Tera rockers, FAST LXSRT intake, Kook ss LT Headres and catted Y's, Circle D 2800 stall. A short time after I got my tune the trany did not want to play nice 1-2, 2-3 sometimes 3-4. If I roll easy accerating theres not really an issue. If I give it more the shudders and slippage feels like its coming in but once in the high gears, No issue really. The temp will rise and I've seen upwards of 200F until cruising down the highway and she'll cut down to 170F.
Attached is the Motor tune, Trans tune I can not upload my logs as they are .PLD files fro EFILive...