I have a 2015 Jeep JK unlimited. I was worried, so I just had a radiator flush performed at the shop and I'm still experiencing the same issue. Under normal load/freeway driving, the temp gauge is rock steady at center. As I climb a grade on the freeway and it downshifts to higher RPM's, the temp goes up to 3/4 hot super quick. As soon as I plateau, drive flat, go downhill within seconds it drops back down to rock steady center. I know the temperature swings in the coolant isn't that quick so I'm just puzzled as to why this happens. Should I even be worried since it always practically immediately drops back to rock steady center? Thanks so much!
