2002 Dodge Caravan......I let the car warm up in the morning as I live in the northeast. Doesnt like to go into gear when you first put it in drive. After it gets running and really warmed up it will go into gear. It is almost like it is just in neutral at first. Could this be low transmission fluid or motor oil? Please advise as I dont have the $$$ to put it in the shop right now. Thanks.