Last drove my truck a few weeks ago and didn't have any problems. Hopped in it yesterday and found that the Service Engine Soon light is on now. It also seemed like it reved up higher than what it needed to in order to move what little it did. Does the transmission start in overdrive when the truck is in limp mode to help protect something. Also I had no reverse, it would not move at all in reverse. Just to busy right now to have it looked at, or even look at it myself. If anyone has any pointers please let me know or where to start at. Truck is a 01, which is bone stock.