My trans temp usually runs around 180 degF after the car is hot. In the mountains with the radiator fans on max, it never went over 200 even pushing it hard in low gear. Before I had my large cooler, on the same mountain runs I spiked up to 290 degF before I even realized it!

All my gauges are now ProSport Halo series gauges. Very happy with them. 1/2 the cost of autometer and defi and no controller!