From what speeds are you wanting to punch it from? At a 60 - 70 mph roll it seems like I get a little quicker response if a take it out of overdrive then punch it. I've had my kick-down feature not work on occassion and that can be really frustrating. If you are more in the 30 - 50 mph range, 2nd gear is best, but make sure you remember to shift to drive near redline (I forgot to do this just yesterday and bounced off the rev limiter hard; I was like, why is a lightly modded Mustang GT pulling on me at 75 mph?). From a dead stop, power-brake to about 2,000 rpm's and then floor it (I get just a slight chirp of the tires and then it hooks-up). We all know, I the tires are spinning, you aren't going anywhere.