This only happens at WOT and particularly in the 3rd to 4th, 4th to 5th, and 5th to 6th. What happens when I shift is the rpm will jump a little than drop down and then the rpm will slowly rise again when accelerating. I believe I also notice the rpm just hang there for a bit, drop down and then catch. The car is tuned so maybe the SST needs to be retuned?