Have you had a look at your trans fluid?

 

water probably went into the vent tube for your transmission. That means you have muddy water in your tranny and you have done some damage to it.

Check your tranny fluid after driving for a while. If it is chocolate, then you have your problem.

Next time, don;t go mudding in your daily driver.

 

Looked at the trans. fluid. From what I could tell it looks normal. It doesn't happen all the time now. When it doesn't go into first I can manually put it in and it goes with out a problem...