Coolant temps of 215 are a non-issue.
ATF temps monitoring is more complicated.
Some OEM's have multiple ATF temp sensors and you often do not know where any given value is coming from. It is exiting the cooler? The trans? The sump? Or is it inline somewhere?
All ATF today is at least a synthetic blend, some are full and pretty high end oil. Temps can for over 240-260 where charts show danger, but thats not reality.
But lets say 240-260 ATF temp is found exiting the trans where it would see its peak temp. Consider how long its at that temp before being cooled down again. Is the time even measurable? A couple seconds are best?
So it really matters where that ATF temp reading is coming from.
Aftermarket ATF cooler manufacturers state to monitor ATF temp EXITING THE COOLER. So, if you see 175-200 coming out of the cooler...that would indicated trouble or you need a much larger cooler!!!
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