Good Set Up?

what do you consider heavy weight?

 

The unanswered question remains.

For a reefer it would be great. As far as the lowboy goes, he didn't give any details on the trailer either, so I will assume he's talking about a 2 axle. It will do the job you need it to do. Most of the time, you shouldn't see more than 94000 lbs.

The thing that you have to be careful about is, that big motor. A proper running 550 horse should be stout. You go hill climbing, and the rpms drop but seemingly hold at 1000 rpms or less. On a long climb, those EGTs get too hot for too long and you will wind up burning holes in the tops of your pistons. So you have to learn to resist the urge to play King of the Hill. Downshift. There's no shame in downshifting. Let those 18 gears do the work. Keep those rpms above 1300 and you should be okay on a hill. Let the gears do the work. It's the primary reason to buy an 18 speed.

 

I had an 04 KW, same specs, pulled a reefer for years, then a 2 axle rgn, always had plenty of power. If it's set at 1850 torque it will do you good.