727 issue for thermodynamicists

Since Summer is here and the time is right for stalling in the streets, I too need to post some 727 blues in hope a righteous Torqueflite Master can inspire me with Right Knowledge.

For some months, I've been experiencing 2-3 flare-up at around 33-35 mph, which has now degenerated to major slipping, BUT:

In HOT weather, after a mile or 3, 3rd starts to catch. After noting this was somewhat better when using Type F in my sieve/transmission, which I re-snugged the pan bolts to 12.5 ft-lbs...

727 issue for thermodynamicists