Hi David, I really love my Kluger. I have only done the one trip as I mentioned yesterday, other driving has just been around the suburbs. It was fantastic driving to Port Fairy. I would recommend the transmission as precaution because transmissions work a lot harder under load, if you trans fluid reches 93 deg C. you are in big trouble. The guy that installed my transmission cooler that the standard cooler on the Kluger is small and that I am better off with full size cooler. I previously towed a Jayco Swan camper trailer with 4 litre auto falcons and always had a cooler fitted. The tare weight of the Swan was 750 Kgs. On a weigh bridge, fully laden [ATM] with water tank full, gas cyl. full, gear and personal luggage it was 1050 Kg's. As you know the Klugers unbraked towing capacity is 750 Kgs. I would be careful with my weights. You may need an electric controller fitted if your camper has electric brakes.