ok, if i'm driving and lets say i come to a stop sign or if i'm stopped for a very short period of time (like five seconds on the brake) and i accelerate again, my car jerks and it kind of feels like a slipping thing. At times it pushes me foward. I took it back to the dealer and they said everything was fine and the mechanic test drove it and he said it was fine but it still fu***ng does it!!! WTF could this probably be?? i have an auto if that helps, thanxxx