I have 2001 Kia Spectra and it has been really cold the past few days and my car will not go into drive or reverse until the car warms up and then it works fine. It worked like this for about 3-4 days. This morning was especially cold and it took like 30 mins to warm up to go. It was working fine and then it sipped out of gear and I pulled over to the side of the road and put it in park. I put it in drive and it jut revs up and doesn't go. Same thing for reverse, it goes in reverse but just revs up. What could this be?