Had a custom tune done on my predator for my 2004 Lighting since then I have bought a hi performance valve body and they say I have to return the line pressure to stock when I go into the predator to modifie the shift pressure their is no arrow or numbers to show I am taking it back to stock or making it firmer I dont think they program for a shift pressure When I call the predator people they dont know anything I would appricate any help
I have an arrow that shows the current settings with either the stock predator tunes or custom tune. Do you have the latest predator version? If not, you can download it from the Diablo website. Your tuner may have disabled the function in your tune, contact them and see what they say.
To trouble shoot -- You could store the custom tune on your computer then reset the predator and see if the shift firmness indicator shows up. If it shows, you know it is something to do with the custom tune. If it does not show it is something wrong with the predator.