I pull a 27' pull behind camper weighing around 8 to 8500# loaded. With using the "tow/haul" mode the truck still shifts into overdrive running @ 1700 rpm around 57-60 mph. I've read in this forum that you can press the button twice to get the "overdrive off" mode. No light illuminates when I do this so I assume my truck does not have this option.

I see some of you are using the Diablo or Superchip programmer to adjust shiftpoints. Will it help the downshift points also? The truck will not shift out of overdrive until I am damn near to the top of the overpass. Otherwise I have to kick it in the ass and drop 2 gears and fear roasting the tranny. I have purchased a Hypertech programmer and it adds more power to the truck and the shifting is better, however it has not remedied my overdrive proplem?

Is there something I have overlooked, don't know about, or can even do anything about??

Any suggestions/help would be greatly appreciated. Thank you.

If my memory serves me right you did not have that option in 04...My 07 has it where you press the button once you get od off push it twice and get tow/haul mode both of which are illuminated on the dash...........chris