For those of us with an aftermarket transmission temp gauge, what temps are you seeing regularly? Whats the hottest you have seen?

I have my temp sensor mounted post cooler so if you have one, post where it is located as Im sure temperatures will change relative to location.

Dont mean to jack the thread, and nor do I have an automatic DSM.

But in my Jeep cherokee sport (XJ) my auto trans temp gauge is before the cooler (radiator and auxiliary cooler) so I know the temp of the fluid leaving the trans. This will ultimatley give me the highest temp the fluid is achieving in the system allowing me to know if its potential hazardous.

Just curious for the reasoning for post cooler temperature?

The ultimate set up would be dual temperature gauges, post and pre-cooler, see what temps are coming out and going in.

I ran into this problem when trying to figure out where to mount my sender. Then it came it me.
Our auto tranny coolers have no fan unless its aftermarket. This means there is no air flowing (or very little) through the cooler at idle.
Since no cooling occurs at idle, the temp gauge will rise to your actual transmission temp. Once you start driving again, you will see it drop back down to see your cooler efficiency.
Its not perfect, but I am glad I mounted mine post cooler.

I usually see 140-160f highway/cruise, 180 when Im fully warmed in traffic, and Ive even seen 220, which scared me, in ridiculous stop and go. I should really look up what the limitations of my autotrans fluid is :/