Just picked up my first landcruiser its a 1986 HJ60 auto, truck is overheating when i go up the mountain close to my house but i can go for longer hyw driving and no major issues, was going to replace radiator but was send a manual transmission radiator mine is an auto, replaced water pump, thermostat and filled the viscus oil in the fan clutch, new belts and coolant found temp was staying lower then noral but i went up the mountain and it over heated to the boiling point, is there any other issues i might have missed other then the radiator and if so whats a good brand radiator to go with for the diesel auto