its a 1993 F-350 7.3l idi ats turbo diesel, crew cab, long bed, E4OD with a gear vendor over/under drive, 4x4, rear end is stock gearing not sure, single tire rear end, (not a dually) truck weight=7300 trailer=1000 and jeep on trailer=3200 GCWR=11,500 pounds i was putting out about 7 pounds of...