So I'm moving from Florida to San Diego, camping on the way through. I need some advice about pulling a 6x12 uhaul trailer with my 2000 ltd 2DR RWD 4runner 3.4L with 185,000miles on it. My father thinks I should get a transmission cooler. But when I asked the mechanic about it he said that there is one built in. So my father thinks I need a trany cooler on top of this one. All that I've read about this subject has been both ways, get the trany or you don't need it. This is a one time towing trip. Any advice would be a great help. Thank you!