I installed a hypertech max energy this week that i got for dirt cheap and i had a 1-2 freewheel then slam into second. turned the shift firmness up on the programmer and now its not existant, not sure what the deal was, i cant imagine it permenatly fixed it but im sure it will extend the life of the tranny as it does have 172k on it! power is also awesome definatly woke the truck up! next step is an sct and custom tune!!