What does the OBD2 reader say is the temperature is at the higher gauge reading?
Are you running the A/C? That will cause the fan to run all the time, and the added airflow might be more than enough to overcome the added heat from the AC system, and so the temperature drops some. Without the AC, the fan probably won’t come on at all until 205 or 210.
You should add a trans cooler. That's higher than I like.
With my setup my TOT usually settles about 100F above ambient temps. I don't drive it when it's super cold out (tires get no grip) so that's roughly 160 in the fall and 180-185 in the summer. This is with the aux. cooler.
IMO an operating temperature that peaks in the 18x range is perfectly fine. You just don't want to be cooking at 200+ constantly; if you run that hot you really should be replacing the fluid every 10-15k instead of 30k. The heat breaks down all the additives and turns the fluid into varnish. On a stock setup though usually the TOT won't go that high until the fluid has already broken down and clutches start slipping.
I used to see temps fall right after a fluid change.
Something deposited in the rad moved , most likely
Put a thick sock over it when you get out of the car.What moron thought it was a good idea to put metal trim on the shifter handle? That fucker gets hot in the summer
Yeah I thought of that a few days ago, don't know why it took me 35 yearsPut a thick sock over it when you get out of the car.
Great, now the Chinese are making knockoff trans coolers and flooding them onAny thoughts on this cooler: 40k Transmission Cooler LPD47391 Low Pressure Drop Trans Oil Cooler Compatible with Heavy Duty 40,000 GVW Max including Mounting Hardware, Towing Applications and Advanced Cooling Protection 47391 https://a.co/d/8HRndv7
I've installed a couple of the name brand Tru-cool units . Have one in my sons green tbird. Did a fluid swap at 90,000 miles... Fluid still nice and red. I did a tech article looong time ago on TSTSNBN installing one. Maybe I should move it over. I recommend. It's not s terrible job to install.Any thoughts on this cooler: 40k Transmission Cooler LPD47391 Low Pressure Drop Trans Oil Cooler Compatible with Heavy Duty 40,000 GVW Max including Mounting Hardware, Towing Applications and Advanced Cooling Protection 47391 https://a.co/d/8HRndv7
Maybe I should move it over.
The tru-cool version of that is what I have. Thinking bout it, I still have one in the box for the t-bird I sold.