Originally Posted by
Aepozzi
Well I think I finally figured this transmission out. There isn't anything wrong with the trans at all. It appears the 2003 duramaxes are rated for 500 ft lbs torque. I re-programed the computer for an additional 80 hp which would be aprox an additional 150 lb torque putting the truck at 650 ftlbs of torque. That's more than the torque converter can handle.
As I stated before I pull a big heavy trailer. It weighs 13,200 lbs empty. I figure I load an additional 2,000 lbs that puts me at 15,200 lbs.
I must say with the additional hp and torque the truck sure did perform well. I guess I need to upgrade to a 2007.
Thanks to all that replied. I appreicate it.
Andy