This maybe more of a tech question for a transmission guru, but was wondering if anyone would know this from this board?

I just return from a weekend camping in Okalahoma with my son. It's about 120 miles North of Dallas. Anyway, on the way home this morning while driving against the wind (wind was about 20-30mph), and through some hills in Oklahoma, the transmission converter was locking/unlocking itself for some time just to keep the truck going at 65mph. As a result, I saw my A/T Temp light up for the very first time. I quickly pull the truck over and let it cool for about 20 min and continue on. within 1/2 hour, it happened again. This time, I just decided to slow the truck down to no more than 60mph and was OK the rest of the way home to Dallas.

Knowing I was going against the wind, along with my lift (less aerodynamic), 35" tires(stock gears), and hills, I guess I shouldn't be too surprise to see the tranny temp go up. I know I'll need a larger cooler, which I'll do this winter.

Questions:
If that happens again, and I were to pull to the side of the road, should I do the following:

A...stop the truck, but keep the engine on and tranny in Park, so to circulate the oil, which helps cool the oil faster?

B...stop the truck, and just shut the engine down to let it cool naturally over time?

In addition to a larger cooler, which of the following cause more heat in the tranny:

C...turn off the O/D switch and just drive it in 3rd gear, eventhough the engine is spinning at a higher RPM?

D...allow converter to continue to lock and unlock itself (while in OverDrive) as needed to keep up the speed of the vehicle?

Thanks for any info.