Biggest problem towing in mountains with a 6.5 is heat. EGT and water temp. Depending on the year you can get a better water pump. That helps.
I have done a little towing with a 6.5 not a ton. But some imho heat is the biggest issue. It causes you to back out when there is enough power to maintain speed
I have done a little towing with a 6.5 not a ton. But some imho heat is the biggest issue. It causes you to back out when there is enough power to maintain speed





