How can one tell if the TC is locked?
In your Ford you can press the "+" on the +/- button on the gear lever and display 1-6 above your gear designator on the instrument cluster. This corresponds to gears 1-6 in the transmission. When NOT engaging Tow/Haul, You'll see a 200-300RPM drop between 35-45MPH holding stead speed without actually shifting from 4th to 5th. You'll feel it "unlock" about the same speed @ about 35-40 when decelerating when you feel the engine braking diminish and RPM will drop to idle almost like you stepped on the clutch or put it in N.
When all 6 gears are displayed on your cluster, the transmission will always try to get to the highest gear it can hold. You can press the "-" and 6 won't be illuminated, and is locked out/unavailable, you can press "-" again and lock out 5th, etc, etc, etc. This is different than running in Manual mode where you choose the gear and it'll hold that gear until you shift.
