Since you tow in that area with those large long grades you will need tow in 3rd gear and be at the higher rpm of about 2700 RPM @ 55MPH. the other problem you created as mentioned is larger tires. what this does is reduce the gear ratio meaning the engine load is increased. If you put on the OEM sized tires you will have more torque available for the tow load.
If I had this type use in this area I would not use those sized tires .
Diesel is not cheap. however you will have the torque to pull the load up the long steep grade.
If I had this type use in this area I would not use those sized tires .
Diesel is not cheap. however you will have the torque to pull the load up the long steep grade.
