Thanks for the input. So the mechanic said the pressure was around 60lbs ( does that sound right? ) and while the TPS hasn't been checked, I don't think .. the "slowing down" happens after shifting. That is ; I shift , it's ok, then as I accelerate to get to the next gear (after the shifting was completed) it slows down, during what should be a natural accel before shifting again. And it's not a slow process, either ..it feels exactly like if I had thrown it into a downshift , abruptly.