I have a 2013 ram 1500 4x4

What is your question?

Yesterday It was in limp mode and would only work in 4th gear I replaced the solenoid pack/ block from my understanding it was in a limp mode and that was the fix. Replaced filled with fluid. It now thinks its in reverse. Needed to be, put in 4x4 low to get up on the stands before the removal. So now that will not change, it needs to be in neutral. And it will not start because it thinks it's in reverse.