well eli when i had my 2005 19ft tailgater i towed it with my 2004 5.7 seqoia and had no problem going up hill or down hill with it and my temperature gage never went up the only thing is that i had to spend more was on gas money. in the hauler i had four quad plus gas station and water tanks the only thing that i had to get was a weigth distribution and the sway control and my seqoia is rated for 6,500