Help! We have a Kia Sedona that has a gremlin in the transmission. When it gets cool to cold outside, the automatic transmission will not engage. After everything warms up, it works just fine. I went for the obvious and changed the transmission fluid to something that FAR exceeds Kias requirements. It's a synthetic so it should be very temperature stable. That did not change a thing. It seems to be temperature related and affects both forward and reverse. If you rev the engine a little, all of a sudden it will bang into gear and go...no good for anything in the driveline so we don't do that but it does engage if you rev the engine up. If anyone has a clue, please share because neither Kia knows (or is not saying) and my independent shop has not heard of this before. If we keep the van in the heated garage, all works great but I sure would like to fix this problem...I may need to make a fast get away from a seedy hotel after I have parked there overnight! Thanks for the help gang!