I just got a new converter, shift kit, and tranny cooler put in about 6 months ago. About 3 months ago in my first to second shifts and second to third shifts in would go in gear, then rev up a little but wouldn't go back down. That part puzzled me a little bit. But tonight a whole new major problem errupted. When im sitting at a stop in drive and floor it, the car just sits still and the rpms go up freely until about a second later it finally grabs. It's a horrible feeling and its all of a sudden too. Anybody have any clue what it is? I'm calling up my trannsmission shop tomorrow to see if I have a warranty on the stuff that they installed. I know the PI has a 2 year warranty but the shop charges 500 dollars JUST to drop a transmission and put it back up.