Answer
I currently work in a refridgeration shop in iowa. one of our shop trucks is a 3500 ext. cab dodge cummins. the automatic transmission is going out; it shifts hard. however the transmission is not
ment to carry as much weight that has been put on this truck so; for heavy hauling you should buy a twin counter-shaft transmission..
if you have a 3500 with heavy hauling. it also burns oil..i am suspecting a slight score in the piston wall.