Smelling Hot Oil when climbing long hills unlocked converter

I've noticed for a while now when I'm off road climbing steep hills for 10-20 minutes and I stop in the middle/top and roll my window down, it smells like very hot fluid. I can only assume its the transmission fluid, since I'm basically at stall speed for an extended period of time and slow vehicle speeds. No leaks or signs of leaks around the pan/bell housing.

But the wierd thing is I monitor both the converter outlet temperature and the pan temperature and neither get above 180 F (I have a large aftermarket cooler with a fan and a 145F trans thermostat).

During these very hard runs, the pan temperature never gets above 160 F and the converter temperature sits around 170-180 F.

The smell is not inside the cab, and with the windows down, it goes away after stopping in less than 2-3 minutes. But in that time, the converter temp only drops 10-15F.

So my question is, if the post converter temperature is around the acceptable temperature range (~175 F), why am I getting this hot oil smell?

Where exactly is the converter fluid temperature sensor? If it's far away from the converter, could the converter actually be at a much higher temperature?

Also, I've asked this in the past to varying answers, but I thought theoretically the toyota ATF WS fluid is rated to 300 F before breaking down, so as long as the pan temperature is below 175F, then the fluid should be fine to peak up much higher as long as it doesnt contact the trans internals? (Since the converter is peak temperature area and after that its just hoses and the cooler?)

I use torque pro to monitor obd2 and import all the data into grafana, so heres a graph on the day where it smells. At peak temperature is when I was just about at the top of the hill. Temperature peaked at 181 F and the pan didn't get above 155F. I guess, is 180F enough to start to smell the heat ? (I know, wierd way to phrase it) - Note: engine coolant peaks at 194F, but has low fidelity data so not included here.