I have a 96 F-250 with the 7.3L and when you put it into reverse the truck will sometimes stall unless you give it some throttle even then it still will stall sometimes it also dies in manual 1st gear. The truck shifts hard and downshifts very hard as well. Tried pulling the pan to check the filter and everything seems okay in there. The fluid level is good and still red not burnt smelling at all. If you floor it while driving the engine limits itself at around 2500 RPMs and it stutters like it is defueling itself. It still has all the power there it should it just acts up. The O/D light is blinking. If you unplug the gear selector it changes the RPMs as well. Any ideas and how to test them would be greatly appreciated as we have tried scanning it and no codes show up and if you try to scan with the truck running the truck just shuts off.