I have a 2003 3500 crew cab dually with 5.9 ho motor with automatic trans.2 wheel drive..I pull a 44 ft gooseneck with race car and quad inside..had it weighed..little over 9500 pounds..I lost the trans other day..no signs..just quit..I'm in Tennessee and wonder if any you guys have same combo and what did you do to your trans..stock or after market mods..I'm told convertor came apart and I need to rebuild the trans..I keep hearing billet convertor and shafts and flywheel. .3 clutch billet convertor. .or just go back to stock? I run a smarty programmer that offer 100 hp and I think it was 150 torque. ..any idea how to build this is appreciated. ...