I am wonderng if any of you guys have xperianced this problem. I have a 2004 4.4i with 47,142 miles on it. When your stopped at a light and you hit the gas the RPM's go up like if the transmission is in neutral then when the RPM's hit around 3500 the gear engages. It only does it once in a while not on a constant basis. The dealer has checked it out and they keep saying that there is nothing wrong with the transmission or any other part of the vehicle. I am just trying to see if any one has had this problem and if it lead up into something much bigger.