Car made do this one or two times a week, some times more. You first start your car up & its sitting at the light or stop sign,and its like the transmission went into neutral, give it some gas in it bangs into gear. But when the car is fully warm up the transmission runs perfect. Had Trans. service pan drop & filter change, with the pan very clean. car has 45,000 miles. So i sent David Norris of Triple Edge Performance a e-mail,this is his reply.With low mileage the dealers often replace the pressure control solenoid to help with this problem. Sometimes input clutch apply piston wear can happen with low mileage so this can be an issue but i would not suspect that yet,just not too common to see that low.GM has a few bulletins for erratic behavior and says to remove the valve body and inspect it and clean it to make sure the valves are free.If you are low at all on line pressure then this is a problem that will happen. So i like to thank David for e-mailing me back.So is there any other member out there with the same problem? Looks like i will be going back to the dealership soon.