We had a 1999 RX 300 with factory towing package, and towed our 2000 lb 18 ft Fish and Ski no problem, at 70 miles per hour, on a 2800 mile trip in 90+ degree weather. Temp guage did not go up at all... Just make sure you tow it in 3rd gear instead of overdrive.... and the transmission fluid is in good shape... I changed it every 15,000 miles...