I am thinking of buying a boat while i am in Florida. I am trying to understand the towing capacity on my truck. The boat i am considering with the trailer weighs about 6600 pounds. In looking at the owners manual, it says that is the maximum i can tow with a 3.08 axle and 8400 pounds with the 3.42 axle. I am not sure which one i have. My truck came new with the trailer brake control mounted on the dash, i believe that means it has the trailering package. If that is the case then im thinking it should have the 3.42 axle. Am i correct in my assumptions? Has anyone else had experience towing something this heavy? Any help would be greatly appreciated.