Found this on a web site: (not sure that i can put the link here)
1960 automatic transmission tuning :"TorqueFlite (V8)"/ TorqueFlite (I-6)/ PowerFlite
Light throttle 1-2 shifts starting from... 10 mph / 9 mph / 11 mph
Light throttle 2-3 shifts starting from... 15 mph / 14 mph / No 3rd gear
Heavy throttle 1-2 shifts 40 mph / 23 mph / 55 mph
Heavy throttle 2-3 shifts 75 mph / 60 mph / No 3rd gear
Kickdown, 2-1, if speed is less than: 25 mph / 22 mph / 50 mph
Kickdown, 3-2, if speed is less than: 65 mph / 60 mph
Low gear button operates at (maximum): 25 mph / 22 mph / 50 mph


Am I seeing that it says heavy throttle 75mph? <----Is that right?