I don't know that I will be pulling that heavy regularly, but I have some. Most recently, I picked up a rusty old 67 IH truck for parts, stripped what I wanted, loaded it with scrap metal when I was done and drove it to the recycler just two days ago on Monday. I grossed in at 13,600 lbs and grossed out at 8,740 lbs. The last time I weighed my truck at the local elevator, it weighed 6100 and change with me in it, and the plate on my trailer says that the empty weight is 2450. Add in four chains and binders and a spare trailer tire, and that makes up the difference. Either way, the trailer and load weighed about 7500 lbs, and I pulled it about 40 miles. Coincidently enough, I am going just east of Cleveland tomorrow to pick up a 1962 IH Travelall (3/4 ton, 4x4) that I just bought on eBay; it should weigh about 6500 - 6700 lbs so I will be dragging a little over 9000 lbs for about 150 miles. I will let you know how it goes, and how much fuel I burn doing it!