I drive a 85 four runner and tow m 19ft north river jet boat all over washington. I have 5in lift 35's and 5.29's. I drive 60-65mph on level highway. 45mph on big hills. I was never to worried about towing it, the problem I had was stopping. I installed rear discs and FJ80 MC and it will stop "ok" now. I have never weighed my boat and trailer but I am guessing 3-3500lbs give or take a few hundred. I bought a 1 ton now and it doesn't know the boat is even behind it. Jsut my 2cents
BRC