1st gear my truck pulls pretty hard, 2nd gear too, but once it hits about 2600 RPM's it falls back to about 2200 RPM's and then jumps back up pretty quick, if I put it in 2nd gear and start off, hammer it around 2000 rpm's I really notice it, feels like a flatspot. Why don't you guys try it or if any of you know if your truck does it or not. It almost seems like the tourqe converter is going out of lockup or something. Let me know what you think.