I have a 7.3 PSD SD lifted 5.5 with 3.73 that have 35 inch tires. I also have the diablo chip set to 54 HP. My question is whether or not I can pull a 7000 lb travel trailer without burning up my tranny. I live in Alaska and pull alot of hills going to and from camping and salmon fishing. Don't want to burn up anything just to be able to tow this trailer. thanks for the help.

By the way it is an automatic tranny

 

You should be okay in the 54HP mode. What are the grades of the hills?