Yes, I have read the other threads, and no my Jeep has not gone above the 252 ceiling, but still when towing my smallish travel trailer up hills or should I say mountains it nears 235-240 and this is in ALASKA! Were talking 50's and 60 degree temps. Maybe I am little freaked out because my Isuzu Trooper bit the dust when the transmission over heated but that was 70's any way. So my diesel nerd co-woker gave me some advice but any tips or feedback on how to keep it cooler? Of if there is even a problem? I keep imagining me in the lower 48 someday towing and this baby really overheating. I agree with the one poster maybe a bigger radiator.