maintaining 50-55 mph in 3rd gear, O/D off, pulling 13280 #'s combined weight up 6 mile long 6% grade (passing folks) with ambient air at 106 degrees. water temp. gauge showed left hand side of needle still touching the 190 mark.
outside air temp at 110 degrees (o'head console) and inside cab temp. at 82. 4
outside air temp at 110 degrees (o'head console) and inside cab temp. at 82. 4