Dodge Ram ques.?

My 2001 Dodge Ram 1500 transmission has been acting weird. Some days it won't go in reverse and other days it will. When I start to go it has to rev up before it clicks into the next gear. When I'm on the highway, my O/D off light will come on and a couple minutes later the trans temp light comes on. The Engine light cane on and it has something to do with a Governor pressure sensor. Can anyone help me with this issue? Cause I have no clue what it could be. Thanks.