Yes the xmission failure was tow related.
I was pulling into a 30/40 mph headwind trying to do 65. I did not realize the wind was so strong. Outside temp was in low 90's.
I have the factory installed towing pkg with oil cooler.
I now have an external xmission cooler in front of the radiator. I purschased and had it installed at a U-Haul dealer.
I made it to within 10 miles from home and had to call a friend to take the trailer the rest of the way. Once my xmission cooled down I made it the last 10 miles. It was covered by warranty.
64K miles on truck with extended warrenty.