I have an 05 with about 70000 on it.It has been tuned with EFI live that was installed by the previous owner. It has a knob with 4 clicks past the factory setting.I have no clue what the settings are and I have no gauges to see if Im going to melt anything. I have tryed each one for a short take off when I first got the truck with 50000 miles. I noticed that it felt like it was slipping a little then. So I dont switch anything on unless I want to throw some smoke on somebody following too close. Now when I accelerate hard It feels like when It just about winds third out and needs to shift to fourth it wont & feels like its slipping. Could it be something electronic or is my tranny just junk? Is there a way to find out what kind of settings have been changed? Would the tranny give some kind of code for slippage?