Engine temp issues (AC/temp gauge readings)
Hello everyone! I think I've read every overheating/towing thread there is on this site. As of yesterday I was certain I need to replace the radiator. Basically it runs great, temps stay where they need to be.....most of the time. I'm in Phoenix, AZ so its hot this time of year. I got stuck in traffic on the freeway the other day and within 15 min the ac started blowing warm. Looked down at the gauges and the coolant temp was sitting about 3/4 of the way up as was the tranny temp. Put the trans in neutral and shut the AC off and both temps were back to normal in seconds. From doing a lot of reading it sounded like my issue was the radiator unitl my little test last night. Outside temp was about 106, left the truck idling outside in direct sunlight with AC on high and set the stop watch. 20 min in all temps were still good and AC was still blowing pretty good. So I set the ebrake and put it in drive. At about the 35 min mark the tranny temp went up about 3/4, but coolant temp didn't budge. Now I don't know what's wrong with it. You would think if it was the radiator it would have been running hot. I do know the transmission fluid needs to be replaced, and I'm doing that this weekend. I don't know, I'm at a loss right now.
2011 Nissan Armada