Quote:
Originally Posted by Dr. Jerryrigger
I have found it nearly impossible to get it to lock under 41, but when it does I can holed it down to 30.
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That's the hysteresis for the TCC logic. There is often a minimum vehicle speed, RPM, coolant temp, max engine load, max TPS %, and a couple of qualifications timers for the lock function.
To unlock, basically the reverse is true with some additional factors such as delta-TPS, brake-pedal switch, park-neutral switch, delta-MAP, and of course the MPH hysteresis which gives the delay so you don't have constant locking and unlocking.
You can get better mileage by adjusting most of these calibrations.