Okay I know I am missing something.
Customer did a 5.3 to 6.0 swap all stock. The truck will not automatically shift to 4th gear. It was for about 3-4 weeks and all of the sudden no 4th. I rode with him and used the HP tuners to command 4th and it goes right in. but as soon as I unclick the 4th gear command it drops back to 3rd. I have moved the 3-4 way down and even up with no change. There are no codes and all sensors seem to be working fine. Attached are the last attempts at a tune and the log.
Any help will be appriciated.