New clutch & fan - in the driveway I can hold shredded paper up and seems to draw just fine - had radiator upgraded to 4 row custom made.....added a trans cooler to isolate....WP & T-stat are within a year - running coolant @70%/30% mineral water to maximize heat displacement (this helped coupled with the other things)....system is clean..... took the Cree light bar from the center of the ARB in front of the grill and put two smaller instead to help air flow upgrading to 2 light bars (one on each side out of the flow area)can run all day long in 30-38C at highway speeds 550-630K per tank and gauge is good even though there are some high/long pulls can take them at speed....it's the long pulls (slow) that get to it....those roads are steeply graded with mutiple switchbacks & getting up to speed is doesn't happen much - that's why the HD aux fan (I think) would be the way to go.....the one I have is used on pro-stock cars - I'll run either a sensor or dash switch......Turbo cooling fan is working correctly also.....