a couple of days ago i was driving down the highway with no problem, i then got off the highway and came to a red light. when the light turned green i stepped on the gas and the car would not move but it had rolled out to the middle of the street so i put it in reverse and stepped on the gas again and it just rolled more in to the street (lol) putting me more into traffic. So the car just acted like it was in neutral. the car would go in to all the gears even in the tiptronic gears but would not move, the engine turns on and accelerates but the car only rolls. I have 're built the transmission and the car had an update on the system a few months ago. But after the rebuilding the car ran fine for about 20 minutes and then it did it again... Need some help with this if anyone has the same problem what they did to fix it. I have all new solenoids and a new torque converter in the rebuilding of the transmission... Please help in anyway .. it's appreciate