maybe I have just noticed this after the smarty because of my more often full throttle runs, sometimes when I really put my foot to the floor while already rolling 30 or 40 mph, or whatever speed, the truck takes off then a couple seconds later. my trans does an instant down shift then upshift, this must be absolute dynamite on the transmission while running all this power through it to have this happen. why is my transmission doing this?!?!?!