Temp gauge shows a rise on the mighty Ram when gunning up a hill.....but only a mil or two....and then returns to normal..... Can only think there is a rad related ( Bulldog problem)Or a transmission overheating prob if auto.... And has cooler in the water rad....as they do sometimes
Could be that the viscous coupling on the fan needs replacing which would explain why its ok on the flat but gets hot on hills.
You're in my country now Your Lordship...what model Patrol, what motor are you running?
if the temp didn't rise while towing up a hill i'd be surprised. these "lug down" climbs are killers for engines, so fans working are a must. Testing cooling efficiency we only ran until the temp topped 100 degC ten kill the test, long slow climbs on roads need the fans to be working to prevent this