I wouldn't worry at all with 180F tranny fluid temps
![](/ubbthreads/images/graemlins/Twocents.gif)
SAE recommends having at LEAST 160 F trans fluid temps to keep the additives in the fluids at the proper operating temps
![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
Petroluem based tranny fluids will start to turn the dye in the fluids from red to brown around 280 to 300 F and then turn to black at or above 325F temps
![](/ubbthreads/images/graemlins/shruggy.gif)
My old Ram 2500 CTD with the trailer towing package never got the fluids above 130 F
![](/ubbthreads/images/graemlins/shock.gif)
Summer or Winter in the Mojave desert in SO CA
![](/ubbthreads/images/graemlins/confused.gif)
Unless I was towing my enclosed race trailer with the car in it
![](/ubbthreads/images/graemlins/shock.gif)
The most Temps. I ever saw on that gauge was 230 F going up the 18 mile long Baker grade on I15 during the middle of the day in August with the outside air temps at 117 F
![](/ubbthreads/images/graemlins/shruggy.gif)
I would change the tranny fluids on every engine oil and filter change(3500 miles usually) to get rid of the condensation in the tranny fluid
![](/ubbthreads/images/graemlins/grin.gif)