Considering finding a bigger tractor presently using a Jd8650 above 100 degrees air temp very hard to keep cool. Would a .8850 or 8960 run cool at those temps pulling about the same equipment. We do tillage work in the hottest part of the year July and  August. I would like a little more power and not  impreessed with all the powertrain and engine issues with 4000hr 9000 seriestractors. I am happy with the 8650 just wished it run cooler ,ac is fine.