I just bought a '69 Starcraft pop-up trailer. While pulling it home (about 15 miles - all back roads and stop and go) I thought I felt the truck getting hot inside the cab. The temp guage never showed any hotter than normal. I felt the transfer case cover and that was hot. I never felt it before while driving. Does it usually get warm while driving or was my trany working too hard towing a pop up? I dont know what the trailer weighs. The PO towed it with a Taurus wagon. It is about 10 or 12 feet long, not including the tonque.