I got an 06 2500 hemi with a 6 inch lift 37's and 4.56 gears. I recently bought a boat. Boat and trailer weigh 3500 4000 max. Around town i guess its fine but when i get on the highway any sort of incline and the truck struggles and goes back and forth from gear to gear. 'm worried im going to ruin my transmission. I also have a superchip which i use to program my truck for "towing". I mean i guess with the lift and the big tires its going to be a little sluggish but for how little load im towing i would expect it to be much more capable. anyone have any suggestions?