I brought this issue up with my Viper Tech today while I was at the dealer getting other work done. He personally never heard the noises I described (chatter/clap when the clutch is released after shifting), including trucks or cars. I told him I did a test to confirm the noise. He said, what did you do. At around 50 -- 55 mph in 5th gear, no throttle, I pushed the clutch in and released it. I heard what I think is the pressure pate re-engaging the clutch, hence the clatter/clap. I didn't try this at other speeds or gears. The best my Viper tech could tell me was keep an eye on it, listen for other noises or if shifting or performance went south bring it back. My truck has a little over 2400 miles on it and is lightly used. It has a B&M shifter in it but I ruled out shifter noise, I am used to that. Other than this issue, the truck shifts fine, no other problems. I guess this is a take it day by day deal.