well i towed a 12,000lb load sun on the nys thruway with my 93 4x4 auto. I was impressed with the way it handled the weight! What a truck! The pyro and trans temp were monitored and even towing in OD the temp never got over 175 with the sensor in the pan. 65 to 70 on the flats and 65 on the hills in OD! Not bad for having no under bed cooler. I know one thing i will change the converter asap. One other thing i run amsoil atf-4 in the trans (awesome fluid). ran 60 miles and i could still hold my hand on the diff cover. Had a new powerchoke go by me about 80 miles an hour but it better for 45,000 dollars and mine cost 8,000!!!!! love these turbo diesels!!