I would never tow in 6th. The trans gets way to hot. I mean I towed a little 16 ft and was shocked at the temps. I am talking 240 and higher in the heat. Winter about 200. I now pull a 46 ft goozneck and I weigh in at 27K +. I have since installed a GV where I can overdrive 5th and temps are well within check now, Summer temps are in the 180-190. And for some reason the rear end even runs cooler.
I have since installed a GV where I can overdrive 5th and temps are well within check now, Summer temps are in the 180-190.