Slippage in this case is the RPM rising quickly after a shift without the truck accelerating like it should. I guess I should use the Predator to give me an actual readout in percent. Do you suggest someone rides along to watch the Predator readout? It may be just be the torque converter. My truck has 65K on it, the spin on was replaced at 55K. I don't really thrash the truck, but on occasion when the road is empty at a 4 way stop, well you know, I might indulge a little.... I'll try tow haul mode over the weekend to see if it acts any different. Has anyone tried the Bully Dog shift enhancer?

Thanks
Jeff