I fussed a lot about a long tow this year from Toronto to NYC (about 10 hours) - I have a 2008 Toyota Highlander, 3.5 litre, 270 hp and has a rated towing capacity of 5,000 lbs. - My 205 Sundowner tops out at about 4000 lbs, and I had 4 adults with weekend luggage in the SUV - I had only a few gallons of gas in the boat, and the water tank was drained.
The Highlander has a transmission cooler and I put fresh transmission fluid in before I left, as well as a good overall tuneup.
The trip was excellent, with no issues and the Highlander performed very well - I definitely exceeded the vehicle's rated capacity, but went fairly slow (55-60 mph), and it was pretty hard on gas, but I took it in to my mechanic afterwards and everything checked out fine.
I wouldn't recommend it for everyone, and I suspect I was lucky to have no problems, but the Toyota lived up to its reputation!
_________________  2005 Sundowner 2008 Highlander V6
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