My son's 2005 PT Cruiser, automatic transmission... last night we were driving up a hill at about 10 mph and it seemed to slip out of gear. Now if we put it in gear, forward or reverse, it acts like it's in neutral. It does not feel like it even tries to engage. It was on a country dirt road at night so we have not able to look at it much yet. This old car is not worth any real transmission work so I am hoping it's something like low fluid or the transmission solenoid. Any ideas or suggestions would be greatly appreciated.