Checked the fluid it doesnt appear or smell to be burnt and is at the correct level. Checked fuses related to the tranny per owners manual. None are blown that I pulled out. Computer Code reader says no codes and everything OK.

Any ideas or suggestions before I pull the pan off.

 

i think im having the same problem, i can only go through 1st and second with overdrive on, revs high but doesnt go after that, usually around 30mph. if i turn OD off the truck runs fine.