Transmission coolers

I typically see temps in the neighborhood of 190°s at 70 mph with the TC unlocked. If the TC is locked it will drop about 15°-20° to about 175°. This is on a summer day with ambient temps around 95°F. When ambient temps drop into the 70°s, and I'm just cruising doing a variety of driving types, the trans temps will be in the 150°'s with the TC unlocked.

I have a 2800 rpm stall converter. Also on the highway, the amount of air you are pushing out of the way can vary from one TBucket to the next. The height of the windshield can make a difference, mine is 16 inches and laid back at 15°.